{"affected":[{"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/06/GHSA-2jx2-qcm4-rf9h/GHSA-2jx2-qcm4-rf9h.json"},"package":{"ecosystem":"SwiftURL","name":"github.com/grpc/grpc-swift","purl":"pkg:swift/github.com/grpc/grpc-swift"},"ranges":[{"events":[{"introduced":"0"},{"fixed":"1.2.0"}],"type":"SEMVER"}]}],"aliases":["CVE-2021-36153"],"database_specific":{"cwe_ids":[],"github_reviewed":true,"github_reviewed_at":"2023-06-09T19:32:18Z","nvd_published_at":"2021-07-09T12:15:00Z","severity":"HIGH"},"details":"### Impact\n\nAffected gRPC Swift servers are vulnerable to precondition failures when parsing certain gRPC Web requests. This may lead to a denial of service.\n\n### Patches\n\nThe problem has been fixed in 1.2.0.\n\n### Workarounds\n\nNo workaround is available. Users must upgrade.","id":"GHSA-2jx2-qcm4-rf9h","modified":"2026-07-08T06:28:17.426247392Z","published":"2023-06-09T19:32:18Z","references":[{"type":"WEB","url":"https://github.com/grpc/grpc-swift/security/advisories/GHSA-2jx2-qcm4-rf9h"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-36153"},{"type":"WEB","url":"https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35267"},{"type":"PACKAGE","url":"https://github.com/grpc/grpc-swift"},{"type":"WEB","url":"https://github.com/grpc/grpc-swift/releases"}],"schema_version":"1.9.0","summary":"Incomplete Internal State Distinction in GRPCWebToHTTP2ServerCodec"}