{"schema":"threatline.record/2","record":{"id":"CVE-2026-111497","aliases":["GHSA-9v8h-qqgm-4m35"],"summary":"Out-of-Bounds Write in Google Brotli Decoder","details":"A buffer overflow vulnerability in the Brotli decoder (c/dec/decode.c) in Google Brotli versions 1.0.3 through 1.2.0 on all platforms allows a remote unauthenticated attacker to corrupt adjacent decoder state memory, disclose sensitive memory contents, cause a denial of service, or potentially execute arbitrary code using a crafted Brotli-compressed stream.\n\n\n\n\n\nUsers need to update any Brotli libraries or binaries between 1.0.3 through 1.2.0 to the latest available version: 1.0.10 or 1.1.1 or 1.2.1.","categories":["Libraries & packages"],"product":"Brotli","vendor":"Google","ecosystem":"PyPI","affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-111497","source_modified_at":"2026-10-24T03:55:16.808Z","fetched_at":"2026-10-24T05:41:33.294140Z","product":"Brotli","vendor":"Google","versions":[{"status":"affected","version":"1.0.3","lessThan":"1.0.10","versionType":"semver"},{"status":"affected","version":"1.1.0","lessThan":"1.1.1","versionType":"semver"},{"status":"affected","version":"1.2.0","lessThan":"1.2.1","versionType":"semver"}],"defaultStatus":"unaffected"},{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-9v8h-qqgm-4m35","source_modified_at":"2026-10-23T19:15:07.942958649Z","fetched_at":"2026-10-23T19:58:35.668311Z","package":{"ecosystem":"PyPI","name":"brotli","purl":"pkg:pypi/brotli"},"ranges":[{"events":[{"introduced":"1.0.3"},{"fixed":"1.2.1"}],"type":"ECOSYSTEM"}],"versions":["1.0.4","1.0.6","1.0.7","1.0.8","1.0.9","1.1.0","1.2.0"]},{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-9v8h-qqgm-4m35","source_modified_at":"2026-10-23T19:15:07.942958649Z","fetched_at":"2026-10-23T19:58:35.668311Z","package":{"ecosystem":"PyPI","name":"brotlicffi","purl":"pkg:pypi/brotlicffi"},"ranges":[{"events":[{"introduced":"1.0.3"},{"fixed":"1.2.1.0"}],"type":"ECOSYSTEM"}],"versions":["1.0.9.0","1.0.9.1","1.0.9.2","1.1.0.0","1.2.0.0","1.2.0.1","1.2.0.2"]}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-111497","source_modified_at":"2026-10-24T03:55:16.808Z","fetched_at":"2026-10-24T05:41:33.294140Z","package":{"name":"Brotli","ecosystem":null},"version":"1.0.10","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-111497","source_modified_at":"2026-10-24T03:55:16.808Z","fetched_at":"2026-10-24T05:41:33.294140Z","package":{"name":"Brotli","ecosystem":null},"version":"1.1.1","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-111497","source_modified_at":"2026-10-24T03:55:16.808Z","fetched_at":"2026-10-24T05:41:33.294140Z","package":{"name":"Brotli","ecosystem":null},"version":"1.2.1","basis":"first unaffected version stated in the CVE record"},{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-9v8h-qqgm-4m35","source_modified_at":"2026-10-23T19:15:07.942958649Z","fetched_at":"2026-10-23T19:58:35.668311Z","package":{"ecosystem":"PyPI","name":"brotli","purl":"pkg:pypi/brotli"},"version":"1.2.1"},{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-9v8h-qqgm-4m35","source_modified_at":"2026-10-23T19:15:07.942958649Z","fetched_at":"2026-10-23T19:58:35.668311Z","package":{"ecosystem":"PyPI","name":"brotlicffi","purl":"pkg:pypi/brotlicffi"},"version":"1.2.1.0"}],"cvss":9.2,"severity":"Critical","kev":{"listed":false},"epss":{"probability":0.0048,"percentile":0.40511,"score_date":"2026-10-23"},"published_at":"2026-10-22T13:35:41.975Z","modified_at":"2026-10-24T03:55:16.808Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-111497","fetched_at":"2026-10-24T05:41:33.294140Z","source_modified_at":"2026-10-24T03:55:16.808Z"},{"source":"OSV","url":"https://osv.dev/vulnerability/GHSA-9v8h-qqgm-4m35","fetched_at":"2026-10-23T19:58:35.668311Z","source_modified_at":"2026-10-23T19:15:07.942958649Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-111497","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","OSV","EPSS"],"references":[{"source":"CVE List","url":"https://nodejs.org/en/blog/vulnerability/october-2026-security-releases#nodejs-brotli-decoder-out-of-bounds-write-permits-remote-code-execution-cve-2026-111497---high","tags":["patch"]},{"source":"CVE List","url":"https://github.com/advisories/GHSA-9v8h-qqgm-4m35"},{"source":"CVE List","url":"https://lists.debian.org/debian-lts-announce/2026/10/msg00049.html"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"total","assessed_at":"2026-10-23T00:00:00+00:00"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"ecosystem","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-24T03:55:16.808Z","content_hash":"e236c573f619e56eab25e390b8ad281ba71c600c36bddc613a13f37feeb182ff"}}