In proxygen from v2026.04.06.00 until v2026.09.28.00, QuicWtSession::closeSession accesses its member fields after calling the base QuicWtSessionBase::closeSession method. The base method notifies the session handler, which may release the …

{
                    "defaultStatus": "unaffected",
                    "product": "proxygen",
                    "vendor": "Facebook",
                    "versions": [
                        {
                            "lessThan": "v2026.09.28.00",
                            "status": "affected",
                            "version": "v2026.04.06.00",
                            "versionType": "semver"
                        }
                    ]
                }