CVE-2026-5122CWE-266CWE-284

osrg GoBGP BGP OPEN Message bgp.go DecodeFromBytes access control

Medium · published March 30, 2026

CVSS v4.0
6.3
EPSS
0%
Percentile
39.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
6.3 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X
EPSS
0.00469 · 39.6th percentile
Weaknesses
CWE-266 · Incorrect Privilege Assignment; CWE-284 · Improper Access Control
Published
2026-03-30T14:15Z
EPSS history
Timeline
  • 30 MAR 14:15Z
    osrg GoBGP BGP OPEN Message bgp.go DecodeFromBytes access control
    cvelistv5