CVE-2026-34243
wenxian is a tool that generates BIBTEX files from identifiers. In versions 0.3.1 and earlier, a GitHub Actions workflow uses untrusted user input directly in a shell command, allowing command injection and arbitrary code execution on the runner. The vulnerability is rated critical.
No official fix yet. If none appears within 45 days of first tracking, this entry is removed automatically.
Who is affected
wenxian tool, versions 0.3.1 and earlier, used via GitHub Actions workflow.
Real-world impact
An attacker could inject commands into the GitHub Actions runner, executing arbitrary code and potentially compromising the build environment or accessing sensitive data.
Why this severity
The CVSS score of 9.8 reflects a network attack vector, low attack complexity, no privileges required, no user interaction, and full confidentiality, integrity, and availability impact.
What to do about it
- ›Avoid using the vulnerable version of wenxian; disable the GitHub Actions workflow that processes untrusted input or restrict the input to trusted sources.
No official fix or mitigation is documented in the sources yet. Monitor the vendor advisory and apply the patch as soon as it is released.
No fix documented in sources
Timeline
- Mar 31, 2026 · Mar 31, 2026PublishedDisclosed and added to the National Vulnerability Database.
- Jul 24, 2026 · 12d agoAdvisory updatedThe NVD record was last revised.
How it’s attacked
References & advisories
- github.com/njzjz/wenxian/security/advi…exploitmitigationvendor advisory