{"schema":"threatline.record/2","record":{"id":"CVE-2026-91095","aliases":[],"summary":"In proxygen from v2024.10.28.00 until v2026.09.28.00, the HTTPTransaction::onWebTransportUniStream and HTTPTransaction::onWebTransportBidiStream APIs could return stream handles that the stream handle","details":"In proxygen from v2024.10.28.00 until v2026.09.28.00, the HTTPTransaction::onWebTransportUniStream and HTTPTransaction::onWebTransportBidiStream APIs could return stream handles that the stream handler had already freed. HQSession then installed those handles as transport read callbacks, which could lead to use of freed memory.","categories":["Unclassified"],"product":"proxygen","vendor":"Facebook","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-91095","source_modified_at":"2026-09-30T19:49:15.429Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"proxygen","vendor":"Facebook","versions":[{"lessThan":"v2026.09.28.00","status":"affected","version":"v2024.10.28.00","versionType":"semver"}],"defaultStatus":"unaffected"}],"fixed_versions":[],"cvss":5.3,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.00247,"percentile":0.15092,"score_date":"2026-10-23"},"published_at":"2026-09-28T20:44:45.928Z","modified_at":"2026-09-30T19:49:15.429Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-91095","fetched_at":"2026-10-23T18:52:38.922436Z","source_modified_at":"2026-09-30T19:49:15.429Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-91095","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://www.facebook.com/security/advisories/cve-2026-91095","tags":["x_refsource_CONFIRM"]},{"source":"CVE List","url":"https://github.com/facebook/proxygen/commit/479eb5574195764e80e6cedebef669f6baa85083","tags":["x_refsource_MISC"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CISA ADP","ssvc":{"exploitation":"none","automatable":"yes","technical_impact":"partial","assessed_at":"2026-09-30T19:49:10.823542Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-09-30T19:49:15.429Z","content_hash":"260d1efdf64e4f0cc1f6aca408b14140b0012c05050623b30ca663eb8d3b73d8"}}