{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-57497","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-06-24T14:53:40.111Z","datePublished":"2026-09-14T16:05:31.661Z","dateUpdated":"2026-09-14T20:06:48.086Z"},"containers":{"cna":{"title":"webtransport-go: Memory Exhaustion Attack due to Buffering of Unknown Capsules","problemTypes":[{"descriptions":[{"cweId":"CWE-770","lang":"en","description":"CWE-770: Allocation of Resources Without Limits or Throttling","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"}}],"references":[{"name":"https://github.com/quic-go/webtransport-go/security/advisories/GHSA-g35j-m5xg-vh3q","tags":["x_refsource_CONFIRM"],"url":"https://github.com/quic-go/webtransport-go/security/advisories/GHSA-g35j-m5xg-vh3q"},{"name":"https://github.com/quic-go/webtransport-go/pull/290","tags":["x_refsource_MISC"],"url":"https://github.com/quic-go/webtransport-go/pull/290"},{"name":"https://github.com/quic-go/webtransport-go/commit/3aecd11736579530ff067651c30a543eb0b4b8c4","tags":["x_refsource_MISC"],"url":"https://github.com/quic-go/webtransport-go/commit/3aecd11736579530ff067651c30a543eb0b4b8c4"},{"name":"https://github.com/quic-go/webtransport-go/releases/tag/v0.11.1","tags":["x_refsource_MISC"],"url":"https://github.com/quic-go/webtransport-go/releases/tag/v0.11.1"}],"affected":[{"vendor":"quic-go","product":"webtransport-go","versions":[{"version":"< 0.11.1","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-09-14T16:05:31.661Z"},"descriptions":[{"lang":"en","value":"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."}],"source":{"advisory":"GHSA-g35j-m5xg-vh3q","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-14T19:22:14.262426Z","id":"CVE-2026-57497","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-09-14T20:06:48.086Z"}}]}}