{"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":"2026-01-20T16:29:37.648Z"},"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"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-01-20T16:29:14.971395Z","id":"CVE-2026-22045","options":[{"Exploitation":"none"},{"Automatable":"no"},{"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":"2026-01-20T16:29:37.648Z"}}]}}