Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Osrg | Gobgp | < 4.3.0 |
Related Weaknesses (CWE)
References
- https://github.com/osrg/gobgp/releases/tag/v4.3.0PatchRelease Notes
- https://github.com/osrg/gobgp/security/advisories/GHSA-8rxh-r2p6-7f2qExploitVendor Advisory
- https://github.com/osrg/gobgp/security/advisories/GHSA-8rxh-r2p6-7f2qExploitVendor Advisory
FAQ
What is CVE-2026-41643?
CVE-2026-41643 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 malf...
How severe is CVE-2026-41643?
CVE-2026-41643 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-41643?
Check the references section above for vendor advisories and patch information. Affected products include: Osrg Gobgp.