{"id":"CVE-2026-41643","state":"PUBLISHED","title":"GoBGP: Remote Denial of Service (Panic) in UpdatePathAttrs4ByteAs via Malformed BGP UPDATE","description":"GoBGP is an open source Border Gateway Protocol (BGP) implementation in the Go Programming Language. Prior to version 4.3.0, a remote Denial of Service (DoS) vulnerability exists in GoBGP where a malformed BGP UPDATE message can trigger a runtime error: index out of range panic. This occurs during the processing of 4-byte AS attributes when the message structure causes an internal slice index shift that is not properly handled. This issue has been patched in version 4.3.0.","publishedAt":"2026-05-07T11:53:23.566Z","updatedAt":"2026-05-07T13:39:04.425Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["osrg gobgp"],"affected":[{"vendor":"osrg","product":"gobgp","versions":[{"version":"< 4.3.0","status":"affected"}]}],"references":["https://github.com/osrg/gobgp/security/advisories/GHSA-8rxh-r2p6-7f2q","https://github.com/osrg/gobgp/releases/tag/v4.3.0"],"weaknesses":["CWE-129"],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/41xxx/CVE-2026-41643.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-41643","state":"PUBLISHED","datePublished":"2026-05-07T11:53:23.566Z","dateUpdated":"2026-05-07T13:39:04.425Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-04-21T23:58:43.802Z"},"containers":{"cna":{"title":"GoBGP: Remote Denial of Service (Panic) in UpdatePathAttrs4ByteAs via Malformed BGP UPDATE","descriptions":[{"lang":"en","value":"GoBGP is an open source Border Gateway Protocol (BGP) implementation in the Go Programming Language. Prior to version 4.3.0, a remote Denial of Service (DoS) vulnerability exists in GoBGP where a malformed BGP UPDATE message can trigger a runtime error: index out of range panic. This occurs during the processing of 4-byte AS attributes when the message structure causes an internal slice index shift that is not properly handled. This issue has been patched in version 4.3.0."}],"affected":[{"vendor":"osrg","product":"gobgp","versions":[{"version":"< 4.3.0","status":"affected"}]}],"references":[{"url":"https://github.com/osrg/gobgp/security/advisories/GHSA-8rxh-r2p6-7f2q","name":"https://github.com/osrg/gobgp/security/advisories/GHSA-8rxh-r2p6-7f2q","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/osrg/gobgp/releases/tag/v4.3.0","name":"https://github.com/osrg/gobgp/releases/tag/v4.3.0","tags":["x_refsource_MISC"]}],"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-129","lang":"en","description":"CWE-129: Improper Validation of Array Index","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-05-07T11:53:23.566Z"},"source":{"advisory":"GHSA-8rxh-r2p6-7f2q","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/osrg/gobgp/security/advisories/GHSA-8rxh-r2p6-7f2q","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-05-07T13:38:29.253036Z","id":"CVE-2026-41643","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-05-07T13:39:04.425Z"}}]}}}