# CVE-2026-5124: gobgp: A security vulnerability has been detected in osrg GoBGP up to 4.3.0

CVE-2026-5124 is fixed in gobgp on 1 platform by DEBIAN-CVE-2026-5124 (version 4.4.0-1), released March 30, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-5124
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0030
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 30, 2026

## Description

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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | gobgp Debian 14 | 4.4.0-1 | [DEBIAN-CVE-2026-5124](https://patchblox.com/security/data/fix/linux/debian-cve-2026-5124.md) | Mar 30, 2026 |

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Data as of 2026-11-08T00:53:09Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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