CVE-2026-57497

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{"affected": [{"affectedData": [{"product": "webtransport-go", "vendor": "quic-go", "versions": [{"status": "affected", "version": "< 0.11.1"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "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."}], "id": "CVE-2026-57497", "lastModified": "2026-09-30T17:51:56.193", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-57497", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-09-14T19:22:14.262426Z", "version": "2.0.3"}}]}, "published": "2026-09-14T17:17:49.097", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/quic-go/webtransport-go/commit/3aecd11736579530ff067651c30a543eb0b4b8c4"}, {"source": "security-advisories@github.com", "url": "https://github.com/quic-go/webtransport-go/pull/290"}, {"source": "security-advisories@github.com", "url": "https://github.com/quic-go/webtransport-go/releases/tag/v0.11.1"}, {"source": "security-advisories@github.com", "url": "https://github.com/quic-go/webtransport-go/security/advisories/GHSA-g35j-m5xg-vh3q"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-770"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,0.11.1)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "webtransport-go", "source": "cna", "vendor": "quic-go"}, "product": "webtransport-go", "vendor": "quic-go"}], "created": "2026-09-15T00:30:10.232682+00:00", "updated": "2026-09-21T00:00:08.085790+00:00", "vendors": ["quic-go", "quic-go$PRODUCT$webtransport-go"]}