{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-22045", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-01-05T22:30:38.720Z", "datePublished": "2026-01-15T22:44:05.423Z", "dateUpdated": "2026-01-15T22:44:05.423Z"}, "containers": {"cna": {"title": "Traefik's ACME TLS-ALPN fast path lacks timeouts and close on handshake stall", "problemTypes": [{"descriptions": [{"cweId": "CWE-770", "lang": "en", "description": "CWE-770: Allocation of Resources Without Limits or Throttling", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/traefik/traefik/security/advisories/GHSA-cwjm-3f7h-9hwq", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/traefik/traefik/security/advisories/GHSA-cwjm-3f7h-9hwq"}, {"name": "https://github.com/traefik/traefik/commit/e9f3089e9045812bcf1b410a9d40568917b26c3d", "tags": ["x_refsource_MISC"], "url": "https://github.com/traefik/traefik/commit/e9f3089e9045812bcf1b410a9d40568917b26c3d"}, {"name": "https://github.com/traefik/traefik/releases/tag/v2.11.35", "tags": ["x_refsource_MISC"], "url": "https://github.com/traefik/traefik/releases/tag/v2.11.35"}, {"name": "https://github.com/traefik/traefik/releases/tag/v3.6.7", "tags": ["x_refsource_MISC"], "url": "https://github.com/traefik/traefik/releases/tag/v3.6.7"}], "affected": [{"vendor": "traefik", "product": "traefik", "versions": [{"version": "< 2.11.35", "status": "affected"}, {"version": ">=3.0.0-beta1, < 3.6.7", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-01-15T22:44:05.423Z"}, "descriptions": [{"lang": "en", "value": "Traefik is an HTTP reverse proxy and load balancer. Prior to 2.11.35 and 3.6.7, there is a potential vulnerability in Traefik ACME TLS certificates' automatic generation: the ACME TLS-ALPN fast path can allow unauthenticated clients to tie up go routines and file descriptors indefinitely when the ACME TLS challenge is enabled. A malicious client can open many connections, send a minimal ClientHello with acme-tls/1, then stop responding, leading to denial of service of the entry point. The vulnerability is fixed in 2.11.35 and 3.6.7."}], "source": {"advisory": "GHSA-cwjm-3f7h-9hwq", "discovery": "UNKNOWN"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "Traefik is an HTTP reverse proxy and load balancer. Prior to 2.11.35 and 3.6.7, there is a potential vulnerability in Traefik ACME TLS certificates' automatic generation: the ACME TLS-ALPN fast path can allow unauthenticated clients to tie up go routines and file descriptors indefinitely when the ACME TLS challenge is enabled. A malicious client can open many connections, send a minimal ClientHello with acme-tls/1, then stop responding, leading to denial of service of the entry point. The vulnerability is fixed in 2.11.35 and 3.6.7."}], "id": "CVE-2026-22045", "lastModified": "2026-01-15T23:15:51.593", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-01-15T23:15:51.593", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/traefik/traefik/commit/e9f3089e9045812bcf1b410a9d40568917b26c3d"}, {"source": "security-advisories@github.com", "url": "https://github.com/traefik/traefik/releases/tag/v2.11.35"}, {"source": "security-advisories@github.com", "url": "https://github.com/traefik/traefik/releases/tag/v3.6.7"}, {"source": "security-advisories@github.com", "url": "https://github.com/traefik/traefik/security/advisories/GHSA-cwjm-3f7h-9hwq"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-770"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{}