6.3

CVE-2026-5122: osrg gobgp Incorrect Privilege Assignment

CVSS: 6.3v4.0MediumAnalyzed
AliasesUBUNTU-CVE-2026-5122DEBIAN-CVE-2026-5122
Published 30-03-2026Last modified 30-03-2026
Open JSON

Vulnerability summary

CVE-2026-5122 is a medium (CVSS 6.3) Incorrect Privilege Assignment vulnerability in osrg gobgp. EPSS estimates a 0.47% chance of exploitation in the next 30 days, higher than 39.3% of scored vulnerabilities.

Overall risk
25/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.3/10
010
Medium · v4.0 (CVE.org)
EPSS score
0.47%
0%100%
Low · +0.18 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 30-03-2026
    PublishedVulnerability first disclosed.
  2. 30-03-2026
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

10 scores · 4 sources · 4 versions

EPSS trend

Probability

0.47%

Chance of exploitation in the next 30 days

Percentile

39%

Versus all other CVEs

30-day change

+0.18 pp

From 0.29% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.47%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • gobgpAll versions (No fix recorded) | < 4.4.0-1
Osrg1 product
  • gobgp4.0 | 4.1 | 4.2 | 4.3.0 | < 4.4.0
Ubuntu1 product
  • gobgpAll versions (No fix recorded)

3 vendors · 3 products

References

9 links