{"action":"Upgrade brotlicffi to 1.2.1.0 or later.","affected":[{"fixed":"1.2.1.0","introduced":"1.0.3"}],"component":"brotlicffi","cve_ids":["CVE-2026-111497"],"ecosystem":"PyPI","epss":0.82641,"exploited":true,"fixed_versions":["1.2.1.0"],"ghsa_id":"GHSA-9v8h-qqgm-4m35","id":"tcs_01M5N3BVGSHH88J7V4ABNEH7Q4","modified_at":"2026-10-29T10:55:43.321941131Z","published_at":"2026-10-22T15:32:49Z","references":["https://osv.dev/vulnerability/GHSA-9v8h-qqgm-4m35","https://nvd.nist.gov/vuln/detail/CVE-2026-111497","https://github.com/google/brotli/commit/0ed4268a4401abcb4472096340477cf4af7d1a2b","https://github.com/google/brotli/commit/50a9b70a4d5e1443fc40927952276b68fffa83a0","https://github.com/google/brotli/commit/b418fa81c48262a86a95332b0bc6d62c30aa78b6","https://github.com/google/brotli/commit/da9806362874b9bd4b552a3af360b5d6347beb12","https://www.cve.org/CVERecord?id=CVE-2026-111497","https://pypi.org/project/brotlicffi","https://pypi.org/project/Brotli","https://opensourcemalware.com/blog/node2shell-affects-python","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","https://nodejs.org/en/blog/vulnerability/october-2026-security-releases","https://github.com/pypa/advisory-database/tree/main/vulns/brotlicffi/PYSEC-2026-4323.yaml","https://github.com/pypa/advisory-database/tree/main/vulns/brotli/PYSEC-2026-4322.yaml","https://github.com/google/brotli/releases/tag/v1.2.1","https://github.com/google/brotli/releases/tag/v1.1.1","https://github.com/google/brotli/releases/tag/v1.0.10","https://github.com/google/brotli"],"severity":{"label":"critical","score":9.2},"sources":[{"source":"osv","source_id":"GHSA-9v8h-qqgm-4m35#PyPI/brotlicffi","url":"https://osv.dev/vulnerability/GHSA-9v8h-qqgm-4m35"},{"source":"nvd","source_id":"CVE-2026-111497","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-111497"},{"source":"kev","source_id":"CVE-2026-111497","url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json"}],"summary":"Brotli: Out-of-bounds write in the Brotli decoder (\"Node2Shell\") also affects the PyPI Brotli package"}