{"id":"CVE-2021-36153","aliases":["GHSA-2jx2-qcm4-rf9h"],"url":"https://o3.security/vulnerability/CVE-2021-36153","summary":"Incomplete Internal State Distinction in GRPCWebToHTTP2ServerCodec","details":"Mismanaged state in GRPCWebToHTTP2ServerCodec.swift in gRPC Swift 1.1.0 and 1.1.1 allows remote attackers to deny service by sending malformed requests.","published":"2021-07-09T12:15:08.063Z","modified":"2026-07-09T12:20:05.073696Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"SwiftURL","name":"github.com/grpc/grpc-swift","fixedVersion":"1.2.0"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35267"},{"type":"ADVISORY","url":"https://github.com/grpc/grpc-swift/releases"},{"type":"ADVISORY","url":"https://github.com/grpc/grpc-swift/security/advisories/GHSA-2jx2-qcm4-rf9h"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-09T12:20:05.073696Z"}}