What is the CVSS score of CVE-2026-26514?

CVE-2026-26514 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.2%.

Which versions of Golang are affected by CVE-2026-26514?

bird-lg-go deployments are vulnerable to remote command injection through the traceroute function, potentially allowing attackers to manipulate network diagnostic commands and gather unauthorized…. A patch is available.

Is there a public PoC exploit available for CVE-2026-26514?

Yes, a public proof-of-concept exploit is available for CVE-2026-26514. Prioritise patching immediately. EPSS: 0.2%.

How to fix or mitigate CVE-2026-26514?

Within 24 hours: Inventory all bird-lg-go instances and assess exposure to untrusted networks. Within 7 days: Apply the available patch (commit 6187a4e or later) to all affected systems and validate traceroute functionality. Within 30 days: Conduct security review of BGP looking glass access controls and implement network segmentation if the service is internet-facing.

Golang CVE-2026-26514

HIGH

Improper Neutralization of Argument Delimiters in a Command ('Argument Injection') (CWE-88)

2026-03-04 cve@mitre.org

Golang Denial Of Service Bird Lg Go

7.5

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.5 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 22:05 vuln.today

PoC Detected

Mar 05, 2026 - 18:07 vuln.today

Public exploit code

Patch released

Mar 05, 2026 - 18:07 nvd

Patch available

CVE Published

Mar 04, 2026 - 16:16 nvd

HIGH 7.5

DescriptionCVE.org

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.

AnalysisAI

Remote attackers can inject arbitrary command-line arguments into bird-lg-go's traceroute module through unsanitized user input, enabling denial-of-service attacks that exhaust system resources. The vulnerability affects Golang and bird-lg-go installations prior to commit 6187a4e, and public exploit code exists. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access

Send crafted HTTP request with injected traceroute flags

Exploit

Parse malicious q parameter via shlex.Split

Execution

Inject arbitrary command-line arguments

Impact

Exhaust system resources causing denial of service

Access

Send crafted HTTP request with injected traceroute flags

Exploit

Parse malicious q parameter via shlex.Split

Execution

Inject arbitrary command-line arguments

Impact

Exhaust system resources causing denial of service

Vulnerability AssessmentAI

Exploitation	bird-lg-go before commit 6187a4e with traceroute module enabled. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment	CVSS 7.5 (HIGH). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	A remote attacker could exploit this vulnerability to compromise the affected system.
Remediation	A vendor patch is available — apply it immediately. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours: Inventory all bird-lg-go instances and assess exposure to untrusted networks. …

Threat intelligence, references, and detailed analysis are available after sign-in.

CVE-2026-26514 vulnerability details – vuln.today

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Golang CVE-2026-26514

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

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Attack ChainAIDerived

Vulnerability AssessmentAI

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External POC / Exploit Code