CVE-2026-5122

Name: CVE-2026-5122
Creator: NVD / NIST
Published: 2026-03-30T15:16:35.947+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.3/10EPSS 0.29%

Last modified Jun 17, 2026

CVE-2026-5122 is a medium-severity vulnerability rated 6.3/10 on the CVSS scale. 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. EPSS estimates a 0.29% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

3.7/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS 4.0

6.3/10

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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.29%

21.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Osrg	Gobgp	< 4.4.0

References

https://github.com/osrg/gobgp/Product
https://github.com/osrg/gobgp/commit/2b09db390a3d455808363c53e409afe6b1b86d2dPatch
https://github.com/osrg/gobgp/pull/3343Issue Tracking
https://vuldb.com/submit/780124Third Party Advisory, VDB Entry
https://vuldb.com/vuln/354154Third Party Advisory, VDB Entry
https://vuldb.com/vuln/354154/ctiPermissions Required, VDB Entry

Timeline

Published: Mar 30, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-5122?

How severe is CVE-2026-5122?

CVE-2026-5122 has a CVSS score of 6.3/10 (MEDIUM severity). The EPSS model estimates a 0.29% probability of exploitation in the next 30 days.

How do I fix CVE-2026-5122?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-5122?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST