CVE-2026-26514: An Argument Injection vulnerability exists in bird-lg-go before commit 6187a4e

Q: How do I fix CVE-2026-26514?

bird-lg-go: upgrade to 1.4.1. Exact commands for each OS are on this page.

Q: Is CVE-2026-26514 being exploited?

CVE-2026-26514 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-26514 affect?

CVE-2026-26514 affects bird-lg-go. Severity is high (CVSS 7.5). An Argument Injection vulnerability exists in bird-lg-go before commit 6187a4e. The traceroute module uses shlex.Split to parse user input without validation, allowing remote attackers to inject arbitrary flags (e.g., -w, -q) via the q para

Q: How urgent is CVE-2026-26514?

Priority 45/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.5REMOTEUPGRADE

CVE-2026-26514 is a high-severity flaw (CVSS 7.5) affecting bird-lg-go. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An Argument Injection vulnerability exists in bird-lg-go before commit 6187a4e. The traceroute module uses shlex.Split to parse user input without validation, allowing remote attackers to inject arbitrary flags (e.g., -w, -q) via the q parameter. This can be exploited to cause a Denial of Service (DoS) by exhausting system resources.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 65%)
CISA exploited list	No
Weakness	CWE-88
Published	2026-03-04
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: xddxdd

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-04 16:16 UTCPublished CVE record published
2026-06-17 10:26 UTCUpdated Record last modified

xddxdd bird-lg-go UPGRADE

Affected: < 1.4.1

Fixed in: 1.4.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy bird-lg-go || rpm -q bird-lg-go || bird-lg-go --version

2. UPGRADE to 1.4.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade bird-lg-go

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade bird-lg-go

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-26514?

bird-lg-go: upgrade to 1.4.1. Exact commands for each OS are on this page.

Is CVE-2026-26514 being exploited?

CVE-2026-26514 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-26514 affect?

CVE-2026-26514 affects bird-lg-go. Severity is high (CVSS 7.5). An Argument Injection vulnerability exists in bird-lg-go before commit 6187a4e. The traceroute module uses shlex.Split to parse user input without validation, allowing remote attackers to inject arbitrary flags (e.g., -w, -q) via the q para

How urgent is CVE-2026-26514?

Priority 45/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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