{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-91095", "assignerOrgId": "4fc57720-52fe-4431-a0fb-3d2c8747b827", "state": "PUBLISHED", "assignerShortName": "Meta", "dateReserved": "2026-09-14T18:40:39.036Z", "datePublished": "2026-09-28T20:44:45.928Z", "dateUpdated": "2026-09-28T20:44:45.928Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "product": "proxygen", "vendor": "Facebook", "versions": [{"lessThan": "v2026.09.28.00", "status": "affected", "version": "v2024.10.28.00", "versionType": "semver"}]}], "dateAssigned": "2026-09-14T00:00:00.000Z", "descriptions": [{"lang": "en", "value": "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."}], "problemTypes": [{"descriptions": [{"description": "Use After Free (CWE-416)", "lang": "en"}]}], "providerMetadata": {"orgId": "4fc57720-52fe-4431-a0fb-3d2c8747b827", "shortName": "Meta", "dateUpdated": "2026-09-28T20:44:45.928Z"}, "references": [{"tags": ["x_refsource_CONFIRM"], "url": "https://www.facebook.com/security/advisories/cve-2026-91095"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/facebook/proxygen/commit/479eb5574195764e80e6cedebef669f6baa85083"}]}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "proxygen", "vendor": "Facebook", "versions": [{"lessThan": "v2026.09.28.00", "status": "affected", "version": "v2024.10.28.00", "versionType": "semver"}]}], "source": "[email protected]"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-91095", "lastModified": "2026-09-28T21:17:19.273", "metrics": {}, "published": "2026-09-28T21:17:19.170", "references": [{"source": "[email protected]", "url": "https://github.com/facebook/proxygen/commit/479eb5574195764e80e6cedebef669f6baa85083"}, {"source": "[email protected]", "url": "https://www.facebook.com/security/advisories/cve-2026-91095"}], "sourceIdentifier": "[email protected]", "vulnStatus": "Deferred"}

{}

{}