{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "0.11.1"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3aecd11736579530ff067651c30a543eb0b4b8c4"
            },
            {
              "fixed": "d03fbc34952e05e833ab2a3810ab55aeefe2bf30"
            }
          ],
          "repo": "https://github.com/quic-go/webtransport-go",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-g35j-m5xg-vh3q"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-770"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/57xxx/CVE-2026-57497.json"
  },
  "details": "webtransport-go is an implementation of the WebTransport protocol. Prior to 0.11.1, Session.parseNextCapsule() in session.go skips an unknown WebTransport capsule on the HTTP/3 request stream by calling io.ReadAll on the capsule reader, retaining the complete declared capsule body in memory. A malicious peer can send a large unknown capsule and cause a client or server to allocate memory for the full payload; QUIC flow control does not bound the total retained allocation because reading advances the flow-control window while the received bytes remain in memory. The resulting memory and resource exhaustion can disrupt or crash the affected process. This issue is fixed in version 0.11.1.",
  "id": "CVE-2026-57497",
  "modified": "2026-09-16T03:30:50.999392754Z",
  "published": "2026-09-14T16:05:31.661Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/quic-go/webtransport-go/releases/tag/v0.11.1"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/57xxx/CVE-2026-57497.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/quic-go/webtransport-go/security/advisories/GHSA-g35j-m5xg-vh3q"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-57497"
    },
    {
      "type": "FIX",
      "url": "https://github.com/quic-go/webtransport-go/commit/3aecd11736579530ff067651c30a543eb0b4b8c4"
    },
    {
      "type": "FIX",
      "url": "https://github.com/quic-go/webtransport-go/pull/290"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "webtransport-go: Memory Exhaustion Attack due to Buffering of Unknown Capsules"
}