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CVE-2026-5123

3.7 · LOW

A weakness has been identified in osrg GoBGP up to 4.3.0.

Published Mar 30, 2026CWE-189EPSS 0.68%

Overview

CVE-2026-5123 is a low-severity vulnerability. It was published on March 30, 2026 and has a CVSS 3.1 base score of 3.7 (LOW).

This vulnerability has a CVSS 3.1 base score of 3.7, rated LOW. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

A weakness has been identified in osrg GoBGP up to 4.3.0. This impacts the function DecodeFromBytes of the file pkg/packet/bgp/bgp.go. Executing a manipulation of the argument data[1] can lead to off-by-one. The attack may be launched remotely. Attacks of this nature are highly complex. The exploitability is said to be difficult. This patch is called 67c059413470df64bc20801c46f64058e88f800f. A patch should be applied to remediate this issue.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/osrg/gobgp/GitHubgithub.com/osrg/gobgp/commit/67c059413470df64bc20801c46f64058e88f800fGitHubgithub.com/osrg/gobgp/pull/3342Refvuldb.com/submit/780179Refvuldb.com/vuln/354155Refvuldb.com/vuln/354155/cti

How CyberStrike helps

Frequently asked questions

What is CVE-2026-5123?

CVE-2026-5123 is a low-severity vulnerability. It was published on March 30, 2026 and has a CVSS 3.1 base score of 3.7 (LOW).

How severe is CVE-2026-5123?

This vulnerability has a CVSS 3.1 base score of 3.7, rated LOW. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-5123?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-5123?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-5123 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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