ghsa-2jx2-qcm4-rf9h

{
  "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"
}