CVE-2026-91096

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "proxygen", "vendor": "Facebook", "versions": [{"lessThan": "v2026.09.28.00", "status": "affected", "version": "v2024.10.28.00", "versionType": "semver"}]}], "source": "cve-assign@fb.com"}], "cveTags": [], "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."}], "id": "CVE-2026-91096", "lastModified": "2026-09-30T20:17:36.637", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-91096", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-09-30T19:47:52.478208Z", "version": "2.0.3"}}]}, "published": "2026-09-28T21:17:19.313", "references": [{"source": "cve-assign@fb.com", "url": "https://github.com/facebook/proxygen/commit/479eb5574195764e80e6cedebef669f6baa85083"}, {"source": "cve-assign@fb.com", "url": "https://www.facebook.com/security/advisories/cve-2026-91096"}], "sourceIdentifier": "cve-assign@fb.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[v2024.10.28.00,v2026.09.28.00)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "proxygen", "source": "cna", "vendor": "Facebook"}, "product": "proxygen", "vendor": "facebook"}], "created": "2026-09-28T22:45:08.187026+00:00", "updated": "2026-10-01T04:15:16.822348+00:00", "vendors": ["facebook", "facebook$PRODUCT$proxygen"]}