CVE-2026-5122: Osrg Gobgp

Low severity, CVSS 3.7. EPSS: 0.5% chance of exploitation in the next 30 days.

A security flaw has been discovered in osrg GoBGP up to 4.3.0. This affects the function DecodeFromBytes of the file pkg/packet/bgp/bgp.go of the component BGP OPEN Message Handler. Performing a manipulation of the argument domainNameLen results in improper access controls. The attack may be initiated remotely. A high degree of complexity is needed for the attack. The exploitability is reported as difficult. The patch is named 2b09db390a3d455808363c53e409afe6b1b86d2d. It is suggested to install a patch to address this issue.

Affected products

• Osrg Gobgp: before 4.4.0 (fixed in 4.4.0)

Published 2026-03-30. Last modified 2026-06-17.