{"items":[{"id":"NVI-00010583","kind":"vulnerability","title":"MessagePack: Unbounded memory leak in msgpack C extension on strict_map_key validation failure","revision":4,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-j586-36cw-2gc2","CVE-2026-114613"],"plain_summary":"GitHub lists this reviewed advisory for msgpack. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-045b37d0caba963e7c99234c04cf3688"],"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":"2026-10-27T15:04:09.000Z","value":"7.5 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-564a37691a5a68d68689e4fd182b61d5"},{"kind":"EPSS","as_of":"2026-11-05T12:03:04.000Z","value":"0.543%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.45745. Missing scores are unknown.","source_id":"sr-045b37d0caba963e7c99234c04cf3688"}],"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-564a37691a5a68d68689e4fd182b61d5","url":"https://github.com/advisories/GHSA-j586-36cw-2gc2","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-j586-36cw-2gc2","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T22:06:46.371Z"},{"id":"sr-045b37d0caba963e7c99234c04cf3688","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-2026-114613","publisher":"FIRST EPSS","observed_at":"2026-11-06T00:24:57.631Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-564a37691a5a68d68689e4fd182b61d5"],"technology":"msgpack","known_exclusions":[],"conditions_summary":"### Impact\n\nThe msgpack-python C extension (`msgpack._cmsgpack`) leaks a decoded map value when deserialization rejects a key with `strict_map_key=True` (the default). Repeated malformed inputs can cause unbounded process memory growth and denial of service in applications that deserialize attacker-controlled MessagePack data. Both `unpackb()` and the streaming `Unpacker` API are affected. The pure-Python fallback does not exhibit this leak in the reported tests.\n\nThe report measured approximately 4 MiB retained per failed parse and 100 MiB after 25 failed parses on Windows with Python 3.14 and msgpack 1.2.2. These are reporter-provided results.\n\n### Additional impact: stale parser-stack references\n\nThe reference-ownership audit performed while fixing this leak found an\nadditional memory-safety issue in the streaming `Unpacker`.\n\nAfter `unpack()` completed a nested container, an inactive parser-stack slot\ncould retain a non-owning pointer to the decoded object. A subsequent `skip()`\ncould reactivate that slot. If parsing then failed, context cleanup treated the\nstale pointer as an owned reference and decremented it.\n\nThis corrupts the object's reference count and can result in a us","public_affected_ranges":["< 1.2.3"]}],"null_published_at":"2026-11-07T07:07:42.548Z","source_updated_at":"2026-10-27T15:04:09.000Z","source_disclosed_at":"2026-10-27T15:04:07.000Z","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":"2026-10-31T22:06:46.371Z"},{"id":"NVI-00010583","kind":"vulnerability","title":"MessagePack: Unbounded memory leak in msgpack C extension on strict_map_key validation failure","revision":3,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-j586-36cw-2gc2","CVE-2026-114613"],"plain_summary":"GitHub lists this reviewed advisory for msgpack. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-069dd554f2890c3b48b3b9fcd40dc021"],"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":"2026-10-27T15:04:09.000Z","value":"7.5 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-564a37691a5a68d68689e4fd182b61d5"},{"kind":"EPSS","as_of":"2026-11-01T12:00:16.000Z","value":"0.543%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.4561. Missing scores are unknown.","source_id":"sr-069dd554f2890c3b48b3b9fcd40dc021"}],"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-564a37691a5a68d68689e4fd182b61d5","url":"https://github.com/advisories/GHSA-j586-36cw-2gc2","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-j586-36cw-2gc2","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T22:06:46.371Z"},{"id":"sr-069dd554f2890c3b48b3b9fcd40dc021","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-2026-114613","publisher":"FIRST EPSS","observed_at":"2026-11-01T14:28:32.266Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-564a37691a5a68d68689e4fd182b61d5"],"technology":"msgpack","known_exclusions":[],"conditions_summary":"### Impact\n\nThe msgpack-python C extension (`msgpack._cmsgpack`) leaks a decoded map value when deserialization rejects a key with `strict_map_key=True` (the default). Repeated malformed inputs can cause unbounded process memory growth and denial of service in applications that deserialize attacker-controlled MessagePack data. Both `unpackb()` and the streaming `Unpacker` API are affected. The pure-Python fallback does not exhibit this leak in the reported tests.\n\nThe report measured approximately 4 MiB retained per failed parse and 100 MiB after 25 failed parses on Windows with Python 3.14 and msgpack 1.2.2. These are reporter-provided results.\n\n### Additional impact: stale parser-stack references\n\nThe reference-ownership audit performed while fixing this leak found an\nadditional memory-safety issue in the streaming `Unpacker`.\n\nAfter `unpack()` completed a nested container, an inactive parser-stack slot\ncould retain a non-owning pointer to the decoded object. A subsequent `skip()`\ncould reactivate that slot. If parsing then failed, context cleanup treated the\nstale pointer as an owned reference and decremented it.\n\nThis corrupts the object's reference count and can result in a us","public_affected_ranges":["< 1.2.3"]}],"null_published_at":"2026-11-02T20:21:07.825Z","source_updated_at":"2026-10-27T15:04:09.000Z","source_disclosed_at":"2026-10-27T15:04:07.000Z","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":"2026-10-31T22:06:46.371Z"},{"id":"NVI-00010583","kind":"vulnerability","title":"MessagePack: Unbounded memory leak in msgpack C extension on strict_map_key validation failure","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-j586-36cw-2gc2","CVE-2026-114613"],"plain_summary":"GitHub lists this reviewed advisory for msgpack. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-19d7073203b1ff541cef23f5db84008c"],"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":"2026-10-27T15:04:09.000Z","value":"7.5 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-564a37691a5a68d68689e4fd182b61d5"},{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.543%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.45614. Missing scores are unknown.","source_id":"sr-19d7073203b1ff541cef23f5db84008c"}],"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-564a37691a5a68d68689e4fd182b61d5","url":"https://github.com/advisories/GHSA-j586-36cw-2gc2","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-j586-36cw-2gc2","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T22:06:46.371Z"},{"id":"sr-19d7073203b1ff541cef23f5db84008c","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-2026-114613","publisher":"FIRST EPSS","observed_at":"2026-10-31T23:13:27.688Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-564a37691a5a68d68689e4fd182b61d5"],"technology":"msgpack","known_exclusions":[],"conditions_summary":"### Impact\n\nThe msgpack-python C extension (`msgpack._cmsgpack`) leaks a decoded map value when deserialization rejects a key with `strict_map_key=True` (the default). Repeated malformed inputs can cause unbounded process memory growth and denial of service in applications that deserialize attacker-controlled MessagePack data. Both `unpackb()` and the streaming `Unpacker` API are affected. The pure-Python fallback does not exhibit this leak in the reported tests.\n\nThe report measured approximately 4 MiB retained per failed parse and 100 MiB after 25 failed parses on Windows with Python 3.14 and msgpack 1.2.2. These are reporter-provided results.\n\n### Additional impact: stale parser-stack references\n\nThe reference-ownership audit performed while fixing this leak found an\nadditional memory-safety issue in the streaming `Unpacker`.\n\nAfter `unpack()` completed a nested container, an inactive parser-stack slot\ncould retain a non-owning pointer to the decoded object. A subsequent `skip()`\ncould reactivate that slot. If parsing then failed, context cleanup treated the\nstale pointer as an owned reference and decremented it.\n\nThis corrupts the object's reference count and can result in a us","public_affected_ranges":["< 1.2.3"]}],"null_published_at":"2026-10-31T23:18:22.440Z","source_updated_at":"2026-10-27T15:04:09.000Z","source_disclosed_at":"2026-10-27T15:04:07.000Z","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":"2026-10-31T22:06:46.371Z"},{"id":"NVI-00010583","kind":"vulnerability","title":"MessagePack: Unbounded memory leak in msgpack C extension on strict_map_key validation failure","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-j586-36cw-2gc2","CVE-2026-114613"],"plain_summary":"GitHub lists this reviewed advisory for msgpack. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-564a37691a5a68d68689e4fd182b61d5"],"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":"2026-10-27T15:04:09.000Z","value":"7.5 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-564a37691a5a68d68689e4fd182b61d5"}],"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-564a37691a5a68d68689e4fd182b61d5","url":"https://github.com/advisories/GHSA-j586-36cw-2gc2","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-j586-36cw-2gc2","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T22:06:46.371Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-564a37691a5a68d68689e4fd182b61d5"],"technology":"msgpack","known_exclusions":[],"conditions_summary":"### Impact\n\nThe msgpack-python C extension (`msgpack._cmsgpack`) leaks a decoded map value when deserialization rejects a key with `strict_map_key=True` (the default). Repeated malformed inputs can cause unbounded process memory growth and denial of service in applications that deserialize attacker-controlled MessagePack data. Both `unpackb()` and the streaming `Unpacker` API are affected. The pure-Python fallback does not exhibit this leak in the reported tests.\n\nThe report measured approximately 4 MiB retained per failed parse and 100 MiB after 25 failed parses on Windows with Python 3.14 and msgpack 1.2.2. These are reporter-provided results.\n\n### Additional impact: stale parser-stack references\n\nThe reference-ownership audit performed while fixing this leak found an\nadditional memory-safety issue in the streaming `Unpacker`.\n\nAfter `unpack()` completed a nested container, an inactive parser-stack slot\ncould retain a non-owning pointer to the decoded object. A subsequent `skip()`\ncould reactivate that slot. If parsing then failed, context cleanup treated the\nstale pointer as an owned reference and decremented it.\n\nThis corrupts the object's reference count and can result in a us","public_affected_ranges":["< 1.2.3"]}],"null_published_at":"2026-10-31T22:27:09.623Z","source_updated_at":"2026-10-27T15:04:09.000Z","source_disclosed_at":"2026-10-27T15:04:07.000Z","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":"2026-10-31T22:06:46.371Z"}],"next_cursor":null,"snapshot_revision":"42594"}