{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-69184","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-08-03T16:00:23.482Z","datePublished":"2026-09-18T17:26:52.210Z","dateUpdated":"2026-09-21T20:48:59.663Z"},"containers":{"cna":{"title":"c-ares: CPU-exhaustion denial of service via unbounded DNS name compression pointer chains","problemTypes":[{"descriptions":[{"cweId":"CWE-407","lang":"en","description":"CWE-407: Inefficient Algorithmic Complexity","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","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:H","version":"3.1"}}],"references":[{"name":"https://github.com/c-ares/c-ares/security/advisories/GHSA-pjmc-gx33-gc76","tags":["x_refsource_CONFIRM"],"url":"https://github.com/c-ares/c-ares/security/advisories/GHSA-pjmc-gx33-gc76"},{"name":"https://github.com/c-ares/c-ares/pull/1164","tags":["x_refsource_MISC"],"url":"https://github.com/c-ares/c-ares/pull/1164"},{"name":"https://github.com/c-ares/c-ares/pull/1210","tags":["x_refsource_MISC"],"url":"https://github.com/c-ares/c-ares/pull/1210"},{"name":"https://github.com/c-ares/c-ares/commit/5c8341ba6ff3a8e4e4dfd616f8ed0418838b8b7b","tags":["x_refsource_MISC"],"url":"https://github.com/c-ares/c-ares/commit/5c8341ba6ff3a8e4e4dfd616f8ed0418838b8b7b"},{"name":"https://github.com/c-ares/c-ares/commit/f1288bbc70e9a1e0a77134c2382157e52d326aea","tags":["x_refsource_MISC"],"url":"https://github.com/c-ares/c-ares/commit/f1288bbc70e9a1e0a77134c2382157e52d326aea"},{"name":"https://github.com/c-ares/c-ares/releases/tag/v1.34.7","tags":["x_refsource_MISC"],"url":"https://github.com/c-ares/c-ares/releases/tag/v1.34.7"}],"affected":[{"vendor":"c-ares","product":"c-ares","versions":[{"version":"< 1.34.7","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-09-18T17:26:52.210Z"},"descriptions":[{"lang":"en","value":"c-ares is an asynchronous resolver library. Prior to 1.34.7, ares_dns_name_parse() enforces backward DNS compression pointers but does not bound the total pointer hops or assembled name length. A malicious DNS server can send a response containing a long descending pointer chain and many resource records whose NAME or RDATA fields refer to the chain, causing repeated decompression work that grows quadratically with message size. A single crafted response can stall the single-threaded c-ares event loop and deny DNS resolution, without causing memory corruption or information disclosure. This issue is fixed in version 1.34.7."}],"source":{"advisory":"GHSA-pjmc-gx33-gc76","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-18T20:13:18.897117Z","id":"CVE-2026-69184","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":"2026-09-21T20:48:59.663Z"}}]}}