{"id":"CVE-2026-91096","state":"PUBLISHED","title":"In proxygen from v2024.10.28.00 until v2026.09.28.00, WebTransportImpl::terminateSessionStreams (WebTransportImpl::destroy in releases before v2025.08.18.00) failed to unregister r","description":"In proxygen from v2024.10.28.00 until v2026.09.28.00, WebTransportImpl::terminateSessionStreams (WebTransportImpl::destroy in releases before v2025.08.18.00) failed to unregister read callbacks for streams that were no longer open before destroying them. The transport could then invoke a read callback that had been freed.","publishedAt":"2026-09-28T20:44:57.363Z","updatedAt":"2026-09-30T19:47:55.479Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","source":"CISA-ADP"},"assigner":"Meta","products":["Facebook proxygen"],"affected":[{"vendor":"Facebook","product":"proxygen","defaultStatus":"unaffected","versions":[{"version":"v2024.10.28.00","status":"affected","lessThan":"v2026.09.28.00","versionType":"semver"}]}],"references":["https://www.facebook.com/security/advisories/cve-2026-91096","https://github.com/facebook/proxygen/commit/479eb5574195764e80e6cedebef669f6baa85083"],"weaknesses":["CWE-416"],"ingestedAt":"2026-10-29T20:13:34.582Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/91xxx/CVE-2026-91096.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-91096","state":"PUBLISHED","datePublished":"2026-09-28T20:44:57.363Z","dateUpdated":"2026-09-30T19:47:55.479Z","assignerShortName":"Meta","assignerOrgId":"4fc57720-52fe-4431-a0fb-3d2c8747b827","dateReserved":"2026-09-14T18:40:39.036Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"In proxygen from v2024.10.28.00 until v2026.09.28.00, WebTransportImpl::terminateSessionStreams (WebTransportImpl::destroy in releases before v2025.08.18.00) failed to unregister read callbacks for streams that were no longer open before destroying them. The transport could then invoke a read callback that had been freed."}],"affected":[{"vendor":"Facebook","product":"proxygen","defaultStatus":"unaffected","versions":[{"version":"v2024.10.28.00","status":"affected","lessThan":"v2026.09.28.00","versionType":"semver"}]}],"references":[{"url":"https://www.facebook.com/security/advisories/cve-2026-91096","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/facebook/proxygen/commit/479eb5574195764e80e6cedebef669f6baa85083","tags":["x_refsource_MISC"]}],"problemTypes":[{"descriptions":[{"description":"Use After Free (CWE-416)","lang":"en"}]}],"providerMetadata":{"shortName":"Meta","orgId":"4fc57720-52fe-4431-a0fb-3d2c8747b827","dateUpdated":"2026-09-28T20:44:57.363Z"},"dateAssigned":"2026-09-14T00:00:00.000Z"},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":7.5,"attackVector":"NETWORK","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"NONE","privilegesRequired":"NONE","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-09-30T19:47:52.478208Z","id":"CVE-2026-91096","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-416","type":"CWE","lang":"en","description":"CWE-416 Use After Free"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-30T19:47:55.479Z"}}]}}}