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 controls. Remote exploitation of the attack is possible. The attack is considered to have high complexity. The exploitability is told to be difficult. The identifier of the patch is f0f24a2a901cbf159260698211ab15c583ced131. To fix this issue, it is recommended to deploy a patch.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.003 (21.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 21st percentile — 21.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.003 · change: -0.002
Affected products
- Osrg Gobgp — versions 4.0, 4.1, 4.2
Weakness classification (CWE)
References
- vuldb.com/vuln/354156 (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/vuln/354156/cti (signature, Permissions Required, permissions-required, VDB Entry)
- vuldb.com/submit/780189 (VDB Entry, Third Party Advisory, third-party-advisory)
- github.com/osrg/gobgp/pull/3340 (issue-tracking, patch, Issue Tracking)
- github.com/osrg/gobgp/commit/f0f24a2a901cbf159260698211ab15c583ced131 (Patch, patch)
- github.com/osrg/gobgp/ (Product, product)
Frequently asked questions
- What is CVE-2026-5124?
- CVE-2026-5124 is a low-severity vulnerability in Osrg Gobgp, classified under Incorrect Privilege Assignment. 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.