{"id":"CVE-2026-41643","sourceIdentifier":"security-advisories@github.com","published":"2026-05-07T12:16:17.623","lastModified":"2026-06-17T10:46:55.830","vulnStatus":"Analyzed","cveTags":[],"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":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"osrg","product":"gobgp","versions":[{"version":"< 4.3.0","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-05-07T13:38:29.253036Z","id":"CVE-2026-41643","options":[{"exploitation":"poc"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-129"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:osrg:gobgp:*:*:*:*:*:*:*:*","versionEndExcluding":"4.3.0","matchCriteriaId":"163FE6F5-1F81-4932-98B8-0A4847DF0133"}]}]}],"references":[{"url":"https://github.com/osrg/gobgp/releases/tag/v4.3.0","source":"security-advisories@github.com","tags":["Patch","Release Notes"]},{"url":"https://github.com/osrg/gobgp/security/advisories/GHSA-8rxh-r2p6-7f2q","source":"security-advisories@github.com","tags":["Exploit","Vendor Advisory"]},{"url":"https://github.com/osrg/gobgp/security/advisories/GHSA-8rxh-r2p6-7f2q","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","tags":["Exploit","Vendor Advisory"]}]}