wenxian: Command Injection in GitHub Actions Workflow via `issue_comment.body`
Priority HIGH 82CWE-77Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-77.
Summary
wenxian is a tool to generate BIBTEX files from given identifiers (DOI, PMID, arXiv ID, or paper title). In versions 0.3.1 and prior, a GitHub Actions workflow uses untrusted user input from issue_comment.body directly inside a shell command, allowing potential command injection and arbitrary code execution on the runner. At time of publication, there are no publicly available patches.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0221 82nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| njzjz | wenxian | up to 0.3.1 | — | No fix listed | CNA |
| — | njzjz/wenxian (GitHub Actions) | up to 0.3.1 | — | No fix listed | GHSA-r4fj-r33x-8v88 |
- wenxian Vendornjzjz Affected up to 0.3.1 Fixed in — No fix listed CNA
- njzjz/wenxian (GitHub Actions) Vendor— Affected up to 0.3.1 Fixed in — No fix listed GHSA-r4fj-r33x-8v88
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-34243
- 2026-10-03 Alias added: GHSA-r4fj-r33x-8v88
References
Sources
- CVE-2026-34243 · CVE Program
- CVE-2026-34243 · NVD
- FIRST EPSS
- GHSA-r4fj-r33x-8v88 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences