Bird Lg Go
CVE-2026-26514
HIGH
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessSend crafted HTTP request with injected traceroute flags
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ExploitParse malicious q parameter via shlex.Split
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ExecutionInject arbitrary command-line arguments
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ImpactExhaust system resources causing denial of service
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Argument sanitization
|
| Exploitation Conditions | bird-lg-go before commit 6187a4e with traceroute module enabled. Remote unauthenticated attacker can inject flags via unvalidated q parameter to traceroute function without authentication or special configuration required. |
| Impact | CVSS 7.5 (HIGH). Attack vector: Network. Complexity: Low. Privileges required: None. User interaction: None. Exploitable via remote/network. Public exploit/POC available. |
| Exploit ScenarioDerived | A remote attacker could exploit this vulnerability to compromise the affected system. |
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Alert meAnalysisAIv1 – Mar 12, 2026
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. A patch is available to remediate this high-severity flaw.
Earlier versions of this analysis (1)
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. [CVSS 7.5 HIGH]
RemediationAI
A vendor patch is available — apply it immediately. Restrict network access to the affected service where possible.
Affects your stack
Find out whether the stacks and servers you run are on an affected version.
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Technical ContextAI · show details
Affects the the q component of Bird-Lg-Go. 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.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
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
Lifecycle Timeline
3DescriptionCVE.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.
Executive ViewAI
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 system information. Organizations using this BGP looking glass tool should prioritize patching to prevent unauthorized access to network infrastructure details.
Apply vendor patch. If patching is delayed: (1) Restrict traceroute module access via network ACLs or WAF to trusted IP ranges only, (2) Disable the traceroute functionality in bird-lg-go configuration if not operationally critical, (3) Implement input validation at the reverse proxy or WAF layer to reject suspicious traceroute parameters.
Threat Intelligence Overview
NVD
CVE.org
EPSS
GitHub
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.
Exploit-DB