{"items":[{"id":"NVI-00004495","kind":"vulnerability","title":"PocketMine-MP vulnerable to server crash using badly formatted sign NBT in BlockActorDataPacket","revision":4,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected.","NVD lastModified does not establish freshness of every associated CPE record."],"lifecycle":"active","identifiers":["GHSA-7wrv-6h42-w54f","CVE-2023-54392"],"plain_summary":"OSV carries this publisher advisory for pocketmine/pocketmine-mp, pocketmine/pocketmine-mp. This is an aggregated source copy; consult the original publisher and compare update dates.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"The original advisory lists fixed boundaries 4.22.3 for pocketmine/pocketmine-mp. Confirm the publisher’s latest guidance.","source_ids":["sr-683dc14ec5e14c20f6f54978d98556fa"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 5.2.1 for pocketmine/pocketmine-mp. Confirm the publisher’s latest guidance.","source_ids":["sr-683dc14ec5e14c20f6f54978d98556fa"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-3099f808fa0b9a6af7f4f5c8613b8f7e"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-10-08T16:16:47.850Z","value":"6.5 MEDIUM (3.1)","meaning":"disclosure@vulncheck.com severity; no combined Null risk score.","source_id":"sr-d0747a26047a2c8efd9736a8b466770a"},{"kind":"CVSS","as_of":"2026-10-08T16:16:47.850Z","value":"7.1 HIGH (4.0)","meaning":"disclosure@vulncheck.com severity; no combined Null risk score.","source_id":"sr-d0747a26047a2c8efd9736a8b466770a"},{"kind":"EPSS","as_of":"2026-11-01T12:00:16.000Z","value":"0.530%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.44862. Missing scores are unknown.","source_id":"sr-3099f808fa0b9a6af7f4f5c8613b8f7e"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-683dc14ec5e14c20f6f54978d98556fa","url":"https://github.com/advisories/GHSA-7wrv-6h42-w54f","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-7wrv-6h42-w54f","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:41:59.955Z"},{"id":"sr-d0747a26047a2c8efd9736a8b466770a","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-54392","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2023-54392","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-01T00:58:59.624Z"},{"id":"sr-3099f808fa0b9a6af7f4f5c8613b8f7e","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2023-54392","publisher":"FIRST EPSS","observed_at":"2026-11-01T14:27:48.610Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-683dc14ec5e14c20f6f54978d98556fa"],"technology":"pocketmine/pocketmine-mp","known_exclusions":[],"conditions_summary":"### Summary\nA player sending a packet can cause the server to crash by providing incorrect sign data in NBT in `BlockActorDataPacket`.\n\n### Details\nThis vulnerability was discovered using the `BlockActorDataPacket`, but other packets may also be affected. The player would seem to just need to send an NBT with an incorrect type to throw this error.\n\n```\n[Server thread/CRITICAL]: pocketmine\\nbt\\UnexpectedTagTypeException: \"Expected a tag of type pocketmine\\nbt\\tag\\CompoundTag, got pocketmine\\nbt\\tag\\ByteTag\" (EXCEPTION) in \"pmsrc/vendor/pocketmine/nbt/src/tag/CompoundTag\" at line 107\n--- Stack trace ---\n  #0 pmsrc/src/network/mcpe/handler/InGamePacketHandler(751): pocketmine\\nbt\\tag\\CompoundTag->getCompoundTag(string[9] FrontText)\n  #1 pmsrc/vendor/pocketmine/bedrock-protocol/src/BlockActorDataPacket(50): pocketmine\\network\\mcpe\\handler\\InGamePacketHandler->handleBlockActorData(object pocketmine\\network\\mcpe\\protocol\\BlockActorDataPacket#220241)\n  #2 pmsrc/src/network/mcpe/NetworkSession(433): pocketmine\\network\\mcpe\\protocol\\BlockActorDataPacket->handle(object pocketmine\\network\\mcpe\\handler\\InGamePacketHandler#190572)\n```\n\n### PoC\nUse a bot or proxy to send a packet when editing a ","public_affected_ranges":["ECOSYSTEM: introduced 4.20.0; fixed 4.22.3"]},{"certainty":"source_listed","source_ids":["sr-683dc14ec5e14c20f6f54978d98556fa"],"technology":"pocketmine/pocketmine-mp","known_exclusions":[],"conditions_summary":"### Summary\nA player sending a packet can cause the server to crash by providing incorrect sign data in NBT in `BlockActorDataPacket`.\n\n### Details\nThis vulnerability was discovered using the `BlockActorDataPacket`, but other packets may also be affected. The player would seem to just need to send an NBT with an incorrect type to throw this error.\n\n```\n[Server thread/CRITICAL]: pocketmine\\nbt\\UnexpectedTagTypeException: \"Expected a tag of type pocketmine\\nbt\\tag\\CompoundTag, got pocketmine\\nbt\\tag\\ByteTag\" (EXCEPTION) in \"pmsrc/vendor/pocketmine/nbt/src/tag/CompoundTag\" at line 107\n--- Stack trace ---\n  #0 pmsrc/src/network/mcpe/handler/InGamePacketHandler(751): pocketmine\\nbt\\tag\\CompoundTag->getCompoundTag(string[9] FrontText)\n  #1 pmsrc/vendor/pocketmine/bedrock-protocol/src/BlockActorDataPacket(50): pocketmine\\network\\mcpe\\handler\\InGamePacketHandler->handleBlockActorData(object pocketmine\\network\\mcpe\\protocol\\BlockActorDataPacket#220241)\n  #2 pmsrc/src/network/mcpe/NetworkSession(433): pocketmine\\network\\mcpe\\protocol\\BlockActorDataPacket->handle(object pocketmine\\network\\mcpe\\handler\\InGamePacketHandler#190572)\n```\n\n### PoC\nUse a bot or proxy to send a packet when editing a ","public_affected_ranges":["ECOSYSTEM: introduced 5.0.0; fixed 5.2.1"]}],"null_published_at":"2026-11-07T22:29:23.438Z","source_updated_at":"2026-09-10T03:56:07.870Z","source_disclosed_at":"2023-07-14T21:50:42.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-10-31T21:41:59.955Z"},{"id":"NVI-00004495","kind":"vulnerability","title":"PocketMine-MP vulnerable to server crash using badly formatted sign NBT in BlockActorDataPacket","revision":3,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-7wrv-6h42-w54f","CVE-2023-54392"],"plain_summary":"OSV carries this publisher advisory for pocketmine/pocketmine-mp, pocketmine/pocketmine-mp. This is an aggregated source copy; consult the original publisher and compare update dates.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"The original advisory lists fixed boundaries 4.22.3 for pocketmine/pocketmine-mp. Confirm the publisher’s latest guidance.","source_ids":["sr-683dc14ec5e14c20f6f54978d98556fa"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 5.2.1 for pocketmine/pocketmine-mp. Confirm the publisher’s latest guidance.","source_ids":["sr-683dc14ec5e14c20f6f54978d98556fa"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-3099f808fa0b9a6af7f4f5c8613b8f7e"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"EPSS","as_of":"2026-11-01T12:00:16.000Z","value":"0.530%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.44862. Missing scores are unknown.","source_id":"sr-3099f808fa0b9a6af7f4f5c8613b8f7e"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-683dc14ec5e14c20f6f54978d98556fa","url":"https://github.com/advisories/GHSA-7wrv-6h42-w54f","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-7wrv-6h42-w54f","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:41:59.955Z"},{"id":"sr-3099f808fa0b9a6af7f4f5c8613b8f7e","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2023-54392","publisher":"FIRST EPSS","observed_at":"2026-11-01T14:27:48.610Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-683dc14ec5e14c20f6f54978d98556fa"],"technology":"pocketmine/pocketmine-mp","known_exclusions":[],"conditions_summary":"### Summary\nA player sending a packet can cause the server to crash by providing incorrect sign data in NBT in `BlockActorDataPacket`.\n\n### Details\nThis vulnerability was discovered using the `BlockActorDataPacket`, but other packets may also be affected. The player would seem to just need to send an NBT with an incorrect type to throw this error.\n\n```\n[Server thread/CRITICAL]: pocketmine\\nbt\\UnexpectedTagTypeException: \"Expected a tag of type pocketmine\\nbt\\tag\\CompoundTag, got pocketmine\\nbt\\tag\\ByteTag\" (EXCEPTION) in \"pmsrc/vendor/pocketmine/nbt/src/tag/CompoundTag\" at line 107\n--- Stack trace ---\n  #0 pmsrc/src/network/mcpe/handler/InGamePacketHandler(751): pocketmine\\nbt\\tag\\CompoundTag->getCompoundTag(string[9] FrontText)\n  #1 pmsrc/vendor/pocketmine/bedrock-protocol/src/BlockActorDataPacket(50): pocketmine\\network\\mcpe\\handler\\InGamePacketHandler->handleBlockActorData(object pocketmine\\network\\mcpe\\protocol\\BlockActorDataPacket#220241)\n  #2 pmsrc/src/network/mcpe/NetworkSession(433): pocketmine\\network\\mcpe\\protocol\\BlockActorDataPacket->handle(object pocketmine\\network\\mcpe\\handler\\InGamePacketHandler#190572)\n```\n\n### PoC\nUse a bot or proxy to send a packet when editing a ","public_affected_ranges":["ECOSYSTEM: introduced 4.20.0; fixed 4.22.3"]},{"certainty":"source_listed","source_ids":["sr-683dc14ec5e14c20f6f54978d98556fa"],"technology":"pocketmine/pocketmine-mp","known_exclusions":[],"conditions_summary":"### Summary\nA player sending a packet can cause the server to crash by providing incorrect sign data in NBT in `BlockActorDataPacket`.\n\n### Details\nThis vulnerability was discovered using the `BlockActorDataPacket`, but other packets may also be affected. The player would seem to just need to send an NBT with an incorrect type to throw this error.\n\n```\n[Server thread/CRITICAL]: pocketmine\\nbt\\UnexpectedTagTypeException: \"Expected a tag of type pocketmine\\nbt\\tag\\CompoundTag, got pocketmine\\nbt\\tag\\ByteTag\" (EXCEPTION) in \"pmsrc/vendor/pocketmine/nbt/src/tag/CompoundTag\" at line 107\n--- Stack trace ---\n  #0 pmsrc/src/network/mcpe/handler/InGamePacketHandler(751): pocketmine\\nbt\\tag\\CompoundTag->getCompoundTag(string[9] FrontText)\n  #1 pmsrc/vendor/pocketmine/bedrock-protocol/src/BlockActorDataPacket(50): pocketmine\\network\\mcpe\\handler\\InGamePacketHandler->handleBlockActorData(object pocketmine\\network\\mcpe\\protocol\\BlockActorDataPacket#220241)\n  #2 pmsrc/src/network/mcpe/NetworkSession(433): pocketmine\\network\\mcpe\\protocol\\BlockActorDataPacket->handle(object pocketmine\\network\\mcpe\\handler\\InGamePacketHandler#190572)\n```\n\n### PoC\nUse a bot or proxy to send a packet when editing a ","public_affected_ranges":["ECOSYSTEM: introduced 5.0.0; fixed 5.2.1"]}],"null_published_at":"2026-11-06T15:18:11.491Z","source_updated_at":"2026-09-10T03:56:07.870Z","source_disclosed_at":"2023-07-14T21:50:42.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.","null_first_observed_at":"2026-10-31T21:41:59.955Z"},{"id":"NVI-00004495","kind":"vulnerability","title":"PocketMine-MP vulnerable to server crash using badly formatted sign NBT in BlockActorDataPacket","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-7wrv-6h42-w54f","CVE-2023-54392"],"plain_summary":"OSV carries this publisher advisory for pocketmine/pocketmine-mp, pocketmine/pocketmine-mp. This is an aggregated source copy; consult the original publisher and compare update dates.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"The original advisory lists fixed boundaries 4.22.3 for pocketmine/pocketmine-mp. Confirm the publisher’s latest guidance.","source_ids":["sr-683dc14ec5e14c20f6f54978d98556fa"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 5.2.1 for pocketmine/pocketmine-mp. Confirm the publisher’s latest guidance.","source_ids":["sr-683dc14ec5e14c20f6f54978d98556fa"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-2da0b81b7c4809d7d74af3239352ae74"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.530%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.44865. Missing scores are unknown.","source_id":"sr-2da0b81b7c4809d7d74af3239352ae74"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-683dc14ec5e14c20f6f54978d98556fa","url":"https://github.com/advisories/GHSA-7wrv-6h42-w54f","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-7wrv-6h42-w54f","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:41:59.955Z"},{"id":"sr-2da0b81b7c4809d7d74af3239352ae74","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2023-54392","publisher":"FIRST EPSS","observed_at":"2026-10-31T22:06:03.704Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-683dc14ec5e14c20f6f54978d98556fa"],"technology":"pocketmine/pocketmine-mp","known_exclusions":[],"conditions_summary":"### Summary\nA player sending a packet can cause the server to crash by providing incorrect sign data in NBT in `BlockActorDataPacket`.\n\n### Details\nThis vulnerability was discovered using the `BlockActorDataPacket`, but other packets may also be affected. The player would seem to just need to send an NBT with an incorrect type to throw this error.\n\n```\n[Server thread/CRITICAL]: pocketmine\\nbt\\UnexpectedTagTypeException: \"Expected a tag of type pocketmine\\nbt\\tag\\CompoundTag, got pocketmine\\nbt\\tag\\ByteTag\" (EXCEPTION) in \"pmsrc/vendor/pocketmine/nbt/src/tag/CompoundTag\" at line 107\n--- Stack trace ---\n  #0 pmsrc/src/network/mcpe/handler/InGamePacketHandler(751): pocketmine\\nbt\\tag\\CompoundTag->getCompoundTag(string[9] FrontText)\n  #1 pmsrc/vendor/pocketmine/bedrock-protocol/src/BlockActorDataPacket(50): pocketmine\\network\\mcpe\\handler\\InGamePacketHandler->handleBlockActorData(object pocketmine\\network\\mcpe\\protocol\\BlockActorDataPacket#220241)\n  #2 pmsrc/src/network/mcpe/NetworkSession(433): pocketmine\\network\\mcpe\\protocol\\BlockActorDataPacket->handle(object pocketmine\\network\\mcpe\\handler\\InGamePacketHandler#190572)\n```\n\n### PoC\nUse a bot or proxy to send a packet when editing a ","public_affected_ranges":["ECOSYSTEM: introduced 4.20.0; fixed 4.22.3"]},{"certainty":"source_listed","source_ids":["sr-683dc14ec5e14c20f6f54978d98556fa"],"technology":"pocketmine/pocketmine-mp","known_exclusions":[],"conditions_summary":"### Summary\nA player sending a packet can cause the server to crash by providing incorrect sign data in NBT in `BlockActorDataPacket`.\n\n### Details\nThis vulnerability was discovered using the `BlockActorDataPacket`, but other packets may also be affected. The player would seem to just need to send an NBT with an incorrect type to throw this error.\n\n```\n[Server thread/CRITICAL]: pocketmine\\nbt\\UnexpectedTagTypeException: \"Expected a tag of type pocketmine\\nbt\\tag\\CompoundTag, got pocketmine\\nbt\\tag\\ByteTag\" (EXCEPTION) in \"pmsrc/vendor/pocketmine/nbt/src/tag/CompoundTag\" at line 107\n--- Stack trace ---\n  #0 pmsrc/src/network/mcpe/handler/InGamePacketHandler(751): pocketmine\\nbt\\tag\\CompoundTag->getCompoundTag(string[9] FrontText)\n  #1 pmsrc/vendor/pocketmine/bedrock-protocol/src/BlockActorDataPacket(50): pocketmine\\network\\mcpe\\handler\\InGamePacketHandler->handleBlockActorData(object pocketmine\\network\\mcpe\\protocol\\BlockActorDataPacket#220241)\n  #2 pmsrc/src/network/mcpe/NetworkSession(433): pocketmine\\network\\mcpe\\protocol\\BlockActorDataPacket->handle(object pocketmine\\network\\mcpe\\handler\\InGamePacketHandler#190572)\n```\n\n### PoC\nUse a bot or proxy to send a packet when editing a ","public_affected_ranges":["ECOSYSTEM: introduced 5.0.0; fixed 5.2.1"]}],"null_published_at":"2026-10-31T22:27:15.278Z","source_updated_at":"2026-09-10T03:56:07.870Z","source_disclosed_at":"2023-07-14T21:50:42.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.","null_first_observed_at":"2026-10-31T21:41:59.955Z"},{"id":"NVI-00004495","kind":"vulnerability","title":"PocketMine-MP vulnerable to server crash using badly formatted sign NBT in BlockActorDataPacket","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-7wrv-6h42-w54f","CVE-2023-54392"],"plain_summary":"OSV carries this publisher advisory for pocketmine/pocketmine-mp, pocketmine/pocketmine-mp. This is an aggregated source copy; consult the original publisher and compare update dates.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"The original advisory lists fixed boundaries 4.22.3 for pocketmine/pocketmine-mp. Confirm the publisher’s latest guidance.","source_ids":["sr-683dc14ec5e14c20f6f54978d98556fa"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 5.2.1 for pocketmine/pocketmine-mp. Confirm the publisher’s latest guidance.","source_ids":["sr-683dc14ec5e14c20f6f54978d98556fa"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-683dc14ec5e14c20f6f54978d98556fa","url":"https://github.com/advisories/GHSA-7wrv-6h42-w54f","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-7wrv-6h42-w54f","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:41:59.955Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-683dc14ec5e14c20f6f54978d98556fa"],"technology":"pocketmine/pocketmine-mp","known_exclusions":[],"conditions_summary":"### Summary\nA player sending a packet can cause the server to crash by providing incorrect sign data in NBT in `BlockActorDataPacket`.\n\n### Details\nThis vulnerability was discovered using the `BlockActorDataPacket`, but other packets may also be affected. The player would seem to just need to send an NBT with an incorrect type to throw this error.\n\n```\n[Server thread/CRITICAL]: pocketmine\\nbt\\UnexpectedTagTypeException: \"Expected a tag of type pocketmine\\nbt\\tag\\CompoundTag, got pocketmine\\nbt\\tag\\ByteTag\" (EXCEPTION) in \"pmsrc/vendor/pocketmine/nbt/src/tag/CompoundTag\" at line 107\n--- Stack trace ---\n  #0 pmsrc/src/network/mcpe/handler/InGamePacketHandler(751): pocketmine\\nbt\\tag\\CompoundTag->getCompoundTag(string[9] FrontText)\n  #1 pmsrc/vendor/pocketmine/bedrock-protocol/src/BlockActorDataPacket(50): pocketmine\\network\\mcpe\\handler\\InGamePacketHandler->handleBlockActorData(object pocketmine\\network\\mcpe\\protocol\\BlockActorDataPacket#220241)\n  #2 pmsrc/src/network/mcpe/NetworkSession(433): pocketmine\\network\\mcpe\\protocol\\BlockActorDataPacket->handle(object pocketmine\\network\\mcpe\\handler\\InGamePacketHandler#190572)\n```\n\n### PoC\nUse a bot or proxy to send a packet when editing a ","public_affected_ranges":["ECOSYSTEM: introduced 4.20.0; fixed 4.22.3"]},{"certainty":"source_listed","source_ids":["sr-683dc14ec5e14c20f6f54978d98556fa"],"technology":"pocketmine/pocketmine-mp","known_exclusions":[],"conditions_summary":"### Summary\nA player sending a packet can cause the server to crash by providing incorrect sign data in NBT in `BlockActorDataPacket`.\n\n### Details\nThis vulnerability was discovered using the `BlockActorDataPacket`, but other packets may also be affected. The player would seem to just need to send an NBT with an incorrect type to throw this error.\n\n```\n[Server thread/CRITICAL]: pocketmine\\nbt\\UnexpectedTagTypeException: \"Expected a tag of type pocketmine\\nbt\\tag\\CompoundTag, got pocketmine\\nbt\\tag\\ByteTag\" (EXCEPTION) in \"pmsrc/vendor/pocketmine/nbt/src/tag/CompoundTag\" at line 107\n--- Stack trace ---\n  #0 pmsrc/src/network/mcpe/handler/InGamePacketHandler(751): pocketmine\\nbt\\tag\\CompoundTag->getCompoundTag(string[9] FrontText)\n  #1 pmsrc/vendor/pocketmine/bedrock-protocol/src/BlockActorDataPacket(50): pocketmine\\network\\mcpe\\handler\\InGamePacketHandler->handleBlockActorData(object pocketmine\\network\\mcpe\\protocol\\BlockActorDataPacket#220241)\n  #2 pmsrc/src/network/mcpe/NetworkSession(433): pocketmine\\network\\mcpe\\protocol\\BlockActorDataPacket->handle(object pocketmine\\network\\mcpe\\handler\\InGamePacketHandler#190572)\n```\n\n### PoC\nUse a bot or proxy to send a packet when editing a ","public_affected_ranges":["ECOSYSTEM: introduced 5.0.0; fixed 5.2.1"]}],"null_published_at":"2026-10-31T22:12:57.129Z","source_updated_at":"2026-09-10T03:56:07.870Z","source_disclosed_at":"2023-07-14T21:50:42.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-10-31T21:41:59.955Z"}],"next_cursor":null,"snapshot_revision":"42594"}