Privilege escalation in Osrg Gobgp
CVE-2026-5124
A security vulnerability has been detected in osrg GoBGP up to 4.3.0. Affected is the function BGPHeader.DecodeFromBytes of the file pkg/packet/bgp/bgp.go of the component BGP Header Handler. The manipulation leads to improper access contr…
EPSS: 0.001 (18.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N/E:X/RL:O/RC:C.
Affected products
- Osrg Gobgp — versions 4.0, 4.1, 4.2
Weakness classification (CWE)
References
- VDB-354156 | osrg GoBGP BGP Header bgp.go BGPHeader.DecodeFromBytes access control (vdb-entry, technical-description)
- VDB-354156 | CTI Indicators (IOB, IOC, TTP, IOA) (signature, permissions-required)
- Submit #780189 | osrg GoBGP 4.3.0 Improper Input Validation (third-party-advisory)
- github.com/osrg/gobgp/pull/3340 (issue-tracking, patch)
- github.com/osrg/gobgp/commit/f0f24a2a901cbf159260698211ab15c583ced131 (patch)
- github.com/osrg/gobgp/ (product)
Frequently asked questions
- What is CVE-2026-5124?
- CVE-2026-5124 is a low-severity vulnerability in Osrg Gobgp, classified under Improper Access Control. CVSS score: 3.7/10. Published 2026-03-30.
- How severe is CVE-2026-5124?
- Low severity. CVSS v3 base score is 3.7 out of 10.