{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-34582","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-03-30T16:56:30.999Z","datePublished":"2026-04-07T21:13:49.281Z","dateUpdated":"2026-04-08T15:41:21.671Z"},"containers":{"cna":{"title":"Botan has a TLS 1.3 certificate authentication bypass","problemTypes":[{"descriptions":[{"cweId":"CWE-841","lang":"en","description":"CWE-841: Improper Enforcement of Behavioral Workflow","type":"CWE"}]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":8.7,"baseSeverity":"HIGH","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","version":"4.0"}}],"references":[{"name":"https://github.com/randombit/botan/security/advisories/GHSA-pxcj-9ppx-g86g","tags":["x_refsource_CONFIRM"],"url":"https://github.com/randombit/botan/security/advisories/GHSA-pxcj-9ppx-g86g"}],"affected":[{"vendor":"randombit","product":"botan","versions":[{"version":"< 3.11.1","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-04-07T21:13:49.281Z"},"descriptions":[{"lang":"en","value":"Botan is a C++ cryptography library. Prior to version 3.11.1, the TLS 1.3 implementation allowed ApplicationData records to be processed prior to the Finished message being received. A server which is attempting to enforce client authentication via certificates can by bypassed by a client which entirely omits Certificate, CertificateVerify, and the Finished message and instead sends application data records. This vulnerability is fixed in 3.11.1."}],"source":{"advisory":"GHSA-pxcj-9ppx-g86g","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-08T15:41:07.742535Z","id":"CVE-2026-34582","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":"2026-04-08T15:41:21.671Z"}}]}}