quic-go HTTP/3 QPACK Header Expansion DoS

{
  "id": "a813341ed0882ad757d06837d4fc74d0721467d5182f96512fa31fc2e52ed03b",
  "url": "https://osv.dev/vulnerability/CVE-2025-64702",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "quic-go HTTP/3 QPACK Header Expansion DoS",
    "summary": "quic-go is an implementation of the QUIC protocol in Go. Versions 0.56.0 and below are vulnerable to excessive memory allocation through quic-go's HTTP/3 client and server implementations by sending a QPACK-encoded HEADERS frame that decodes into a large header field section (many unique header names and/or large values). The implementation builds an http.Header (used on the http.Request and http.Response, respectively), while only enforcing limits on the size of the (QPACK-compressed) HEADERS frame, but not on the decoded header, leading to memory exhaustion. This issue is fixed in version 0.57.0.",
    "evidence": "osv:CVE-2025-64702",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2025-64702",
      "aliases": [
        "CVE-2025-64702",
        "GHSA-g754-hx8w-x2g6",
        "GO-2025-4233"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/quic-go/quic-go",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "5b2d2129f8315da41e01eff0a847ab38a34e83a8"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.57.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "5b2d2129f8315da41e01eff0a847ab38a34e83a8"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "cpe": "cpe:2.3:a:quic-go_project:quic-go:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.57.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.56.0",
            "v0.55.0",
            "v0.54.0",
            "v0.49.0",
            "v0.53.0",
            "v0.52.0",
            "v0.51.0",
            "v0.50.0",
            "v0.48.1",
            "v0.48.0",
            "v0.47.0",
            "v0.46.0",
            "v0.45.0",
            "v0.44.0",
            "v0.43.0",
            "v0.42.0",
            "v0.41.0",
            "v0.40.0",
            "v0.38.1",
            "v0.39.0",
            "v0.38.0",
            "v0.33.0",
            "v0.37.1",
            "v0.37.0",
            "v0.36.0",
            "v0.35.1",
            "v0.35.0",
            "v0.34.0",
            "v0.32.0",
            "v0.31.1",
            "v0.31.0",
            "v0.30.0",
            "v0.29.0",
            "v0.28.1",
            "v0.28.0",
            "v0.27.0",
            "v0.26.0",
            "v0.25.0",
            "v0.24.0",
            "v0.23.0",
            "v0.22.0",
            "v0.21.1",
            "v0.21.0",
            "v.0.21",
            "v0.7.0",
            "v0.6.0",
            "v0.5.0",
            "v0.4"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-64702.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:45.807031178Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/64xxx/CVE-2025-64702.json",
        "https://github.com/quic-go/quic-go/security/advisories/GHSA-g754-hx8w-x2g6",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-64702",
        "https://github.com/quic-go/quic-go/commit/5b2d2129f8315da41e01eff0a847ab38a34e83a8"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-770"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/64xxx/CVE-2025-64702.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-64702",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 513698,
  "published_at": "2025-12-11T20:58:10.517+00:00"
}