{"id":"CVE-2026-91096","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 read callbacks for streams that were no longer open before…","summary":"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…","severity":"none","cwe":["CWE-416"],"vendor":"Facebook","product":"proxygen","affected":["proxygen >= v2024.10.28.00 < v2026.09.28.00"],"published":"2026-09-28","updated":"2026-09-28","sourceUpdated":"2026-09-28T21:17:19.420","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-91096","references":[{"url":"https://github.com/facebook/proxygen/commit/479eb5574195764e80e6cedebef669f6baa85083","label":"cve-assign@fb.com"},{"url":"https://www.facebook.com/security/advisories/cve-2026-91096","label":"cve-assign@fb.com"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-28T21:20:54.787Z","slug":"CVE-2026-91096","body":"## Overview\n\nIn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}