{"items":[{"id":"NVI-00008897","kind":"vulnerability","title":"Autobahn Python: permessage-brotli inflates a whole frame before maxMessagePayloadSize is checked (incomplete fix of GHSA-hxp9-w8x3-p566)","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-pjh6-c8mg-3x7m","CVE-2026-116579"],"plain_summary":"GitHub lists this reviewed advisory for autobahn. 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-1b7aa73fb8daf76f1e91618fb1fc2fe8"],"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":"2026-10-28T21:10:18.000Z","value":"5.9 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-218d55f557e7a9327d1d35991fb12d7f"},{"kind":"CVSS","as_of":"2026-10-27T16:03:45.247Z","value":"5.9 MEDIUM (3.1)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-1d9b4ad6a02d76ccf6e65fe1ac3df8ed"},{"kind":"EPSS","as_of":"2026-11-03T12:00:27.000Z","value":"0.425%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.36829. Missing scores are unknown.","source_id":"sr-1b7aa73fb8daf76f1e91618fb1fc2fe8"}],"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-218d55f557e7a9327d1d35991fb12d7f","url":"https://github.com/advisories/GHSA-pjh6-c8mg-3x7m","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-pjh6-c8mg-3x7m","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T21:56:08.420Z"},{"id":"sr-1d9b4ad6a02d76ccf6e65fe1ac3df8ed","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-116579","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-116579","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-03T09:59:00.529Z"},{"id":"sr-1b7aa73fb8daf76f1e91618fb1fc2fe8","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-2026-116579","publisher":"FIRST EPSS","observed_at":"2026-11-03T17:44:07.777Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-218d55f557e7a9327d1d35991fb12d7f"],"technology":"autobahn","known_exclusions":[],"conditions_summary":"### Summary\n\npermessage-brotli inflates each frame fully before checking maxMessagePayloadSize, so one 421-byte frame makes the server allocate about 545 MiB even with a 1 MiB message limit (brotli expands about 1,000,000:1). Any unauthenticated client can exhaust server memory this way on servers that enable permessage-brotli. This bypasses the GHSA-hxp9-w8x3-p566 fix.\n\n### Details\n\nIn 26.7.1 the receive path passes the remaining `maxMessagePayloadSize` budget to `decompress_message_data(..., max_output_len=...)`. deflate and bzip2 stop at that budget. `PerMessageBrotli.decompress_message_data` (`compress_brotli.py`) instead calls `self._decompressor.process(data)` with no limit and compares the length afterwards, so the whole frame is inflated first.\n\nThe code comment and changelog say this is still \"bounded on the wire by `maxFramePayloadSize`\", but brotli reaches about 1,000,000:1 (841 bytes inflate to 1 GiB), so that bound means little. A 421-byte frame against a 1 MiB budget peaks at 545 MiB before the 1009 rejection.\n\nAn autobahn asyncio server on 127.0.0.1 accepting permessage-brotli, with `maxFramePayloadSize=64 KiB` and `maxMessagePayloadSize=1 MiB`, received one small br","public_affected_ranges":[">= 26.7.1, < 26.10.1"]}],"null_published_at":"2026-11-07T14:01:55.396Z","source_updated_at":"2026-10-28T21:10:18.000Z","source_disclosed_at":"2026-10-28T21:10:17.000Z","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":"2026-10-31T21:56:08.420Z"},{"id":"NVI-00008897","kind":"vulnerability","title":"Autobahn Python: permessage-brotli inflates a whole frame before maxMessagePayloadSize is checked (incomplete fix of GHSA-hxp9-w8x3-p566)","revision":3,"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-pjh6-c8mg-3x7m","CVE-2026-116579"],"plain_summary":"GitHub lists this reviewed advisory for autobahn. 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-0fc849a7457a922cd9815e3d36703574"],"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":"2026-10-28T21:10:18.000Z","value":"5.9 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-218d55f557e7a9327d1d35991fb12d7f"},{"kind":"CVSS","as_of":"2026-10-27T16:03:45.247Z","value":"5.9 MEDIUM (3.1)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-1d9b4ad6a02d76ccf6e65fe1ac3df8ed"},{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.425%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.36811. Missing scores are unknown.","source_id":"sr-0fc849a7457a922cd9815e3d36703574"}],"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-218d55f557e7a9327d1d35991fb12d7f","url":"https://github.com/advisories/GHSA-pjh6-c8mg-3x7m","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-pjh6-c8mg-3x7m","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T21:56:08.420Z"},{"id":"sr-1d9b4ad6a02d76ccf6e65fe1ac3df8ed","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-116579","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-116579","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-03T09:59:00.529Z"},{"id":"sr-0fc849a7457a922cd9815e3d36703574","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-2026-116579","publisher":"FIRST EPSS","observed_at":"2026-10-31T22:06:15.374Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-218d55f557e7a9327d1d35991fb12d7f"],"technology":"autobahn","known_exclusions":[],"conditions_summary":"### Summary\n\npermessage-brotli inflates each frame fully before checking maxMessagePayloadSize, so one 421-byte frame makes the server allocate about 545 MiB even with a 1 MiB message limit (brotli expands about 1,000,000:1). Any unauthenticated client can exhaust server memory this way on servers that enable permessage-brotli. This bypasses the GHSA-hxp9-w8x3-p566 fix.\n\n### Details\n\nIn 26.7.1 the receive path passes the remaining `maxMessagePayloadSize` budget to `decompress_message_data(..., max_output_len=...)`. deflate and bzip2 stop at that budget. `PerMessageBrotli.decompress_message_data` (`compress_brotli.py`) instead calls `self._decompressor.process(data)` with no limit and compares the length afterwards, so the whole frame is inflated first.\n\nThe code comment and changelog say this is still \"bounded on the wire by `maxFramePayloadSize`\", but brotli reaches about 1,000,000:1 (841 bytes inflate to 1 GiB), so that bound means little. A 421-byte frame against a 1 MiB budget peaks at 545 MiB before the 1009 rejection.\n\nAn autobahn asyncio server on 127.0.0.1 accepting permessage-brotli, with `maxFramePayloadSize=64 KiB` and `maxMessagePayloadSize=1 MiB`, received one small br","public_affected_ranges":[">= 26.7.1, < 26.10.1"]}],"null_published_at":"2026-11-03T10:03:31.376Z","source_updated_at":"2026-10-28T21:10:18.000Z","source_disclosed_at":"2026-10-28T21:10:17.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-10-31T21:56:08.420Z"},{"id":"NVI-00008897","kind":"vulnerability","title":"Autobahn Python: permessage-brotli inflates a whole frame before maxMessagePayloadSize is checked (incomplete fix of GHSA-hxp9-w8x3-p566)","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-pjh6-c8mg-3x7m","CVE-2026-116579"],"plain_summary":"GitHub lists this reviewed advisory for autobahn. 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-0fc849a7457a922cd9815e3d36703574"],"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":"2026-10-28T21:10:18.000Z","value":"5.9 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-218d55f557e7a9327d1d35991fb12d7f"},{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.425%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.36811. Missing scores are unknown.","source_id":"sr-0fc849a7457a922cd9815e3d36703574"}],"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-218d55f557e7a9327d1d35991fb12d7f","url":"https://github.com/advisories/GHSA-pjh6-c8mg-3x7m","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-pjh6-c8mg-3x7m","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T21:56:08.420Z"},{"id":"sr-0fc849a7457a922cd9815e3d36703574","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-2026-116579","publisher":"FIRST EPSS","observed_at":"2026-10-31T22:06:15.374Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-218d55f557e7a9327d1d35991fb12d7f"],"technology":"autobahn","known_exclusions":[],"conditions_summary":"### Summary\n\npermessage-brotli inflates each frame fully before checking maxMessagePayloadSize, so one 421-byte frame makes the server allocate about 545 MiB even with a 1 MiB message limit (brotli expands about 1,000,000:1). Any unauthenticated client can exhaust server memory this way on servers that enable permessage-brotli. This bypasses the GHSA-hxp9-w8x3-p566 fix.\n\n### Details\n\nIn 26.7.1 the receive path passes the remaining `maxMessagePayloadSize` budget to `decompress_message_data(..., max_output_len=...)`. deflate and bzip2 stop at that budget. `PerMessageBrotli.decompress_message_data` (`compress_brotli.py`) instead calls `self._decompressor.process(data)` with no limit and compares the length afterwards, so the whole frame is inflated first.\n\nThe code comment and changelog say this is still \"bounded on the wire by `maxFramePayloadSize`\", but brotli reaches about 1,000,000:1 (841 bytes inflate to 1 GiB), so that bound means little. A 421-byte frame against a 1 MiB budget peaks at 545 MiB before the 1009 rejection.\n\nAn autobahn asyncio server on 127.0.0.1 accepting permessage-brotli, with `maxFramePayloadSize=64 KiB` and `maxMessagePayloadSize=1 MiB`, received one small br","public_affected_ranges":[">= 26.7.1, < 26.10.1"]}],"null_published_at":"2026-10-31T22:13:48.404Z","source_updated_at":"2026-10-28T21:10:18.000Z","source_disclosed_at":"2026-10-28T21:10:17.000Z","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":"2026-10-31T21:56:08.420Z"}],"next_cursor":null,"snapshot_revision":"42594"}