{"id":"CVE-2026-41643","summary":"GoBGP: Remote Denial of Service (Panic) in UpdatePathAttrs4ByteAs via Malformed BGP UPDATE","details":"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.","aliases":["GHSA-8rxh-r2p6-7f2q"],"modified":"2026-06-18T03:55:43.841863835Z","published":"2026-05-07T11:53:23.566Z","database_specific":{"cna_assigner":"GitHub_M","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41643.json","cwe_ids":["CWE-129"]},"references":[{"type":"WEB","url":"https://github.com/osrg/gobgp/releases/tag/v4.3.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41643.json"},{"type":"ADVISORY","url":"https://github.com/osrg/gobgp/security/advisories/GHSA-8rxh-r2p6-7f2q"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-41643"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/osrg/gobgp","events":[{"introduced":"0"},{"fixed":"c3eb0db6df91379e15ce1a8709cb1b64f482248e"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"4.3.0"},{"introduced":"0"},{"fixed":"4.3.0"}],"cpe":"cpe:2.3:a:osrg:gobgp:*:*:*:*:*:*:*:*","source":["AFFECTED_FIELD","CPE_RANGE","REFERENCES"]}}],"versions":["v4.2.0","v4.1.0","v4.0.0","v3.37.0","v3.36.0","v3.35.0","v3.34.0","v3.33.0","v3.32.0","v3.31.0","v3.30.0","v3.29.0","v3.28.0","v3.27.0","v3.26.0","v3.25.0","v3.24.0","v3.23.0","v3.22.0","v3.21.0","v3.20.0","v3.19.0","v3.17.0","v3.16.0","v3.15.0","v3.14.0","v3.13.0","v3.12.0","v3.11.0","v3.10.0","v3.9.0","v3.8.0","v3.7.0","v3.6.0","v3.5.0","v3.4.0","v3.3.0","v3.2.0","v3.1.0","v3.0.0","v3.0.0-rc4","v3.0.0-rc3","v3.0.0-rc2","v3.0.0-rc1","v2.34.0","v2.33.0","v2.32.0","v2.31.0","v2.30.0","v2.29.0","v2.28.0","v2.27.0","v2.26.0","v2.25.0","v2.24.0","v2.23.0","v2.22.0","v2.21.0","v2.20.0","v2.19.0","v2.18.0","v2.17.0","v2.16.0","v2.15.0","v2.14.0","v2.13.0","v2.12.0","v2.11.0","v2.10.0","v2.9.0","v2.8.0","v2.7.0","v2.6.0","v2.5.0","v2.4.0","v2.3.0","v2.2.0","v2.1.0","v2.0.0","v1.33","v1.32","v1.31","v1.30","v1.29","v1.28","v1.27","v1.26","v1.25","v1.24","v1.23","v1.22","v1.21","v1.20","v1.19","v1.18","v1.17","v1.16","v1.15","v1.14","v1.13","v1.12","v1.11","v1.10","v1.9","v1.8","v1.7","v1.6","v1.5","v1.4","v1.3","v1.2","v1.1","v1.0"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-41643.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}