RCE in Njzjz Wenxian
CVE-2026-34243
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.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.028 (85.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 85.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.022 · newest: 0.028 · change: +0.006
Affected products
- Njzjz Wenxian — versions <= 0.3.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/njzjz/wenxian/security/advisories/GHSA-r4fj-r33x-8v88 (Exploit, Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-34243?
- CVE-2026-34243 is a critical-severity vulnerability in Njzjz Wenxian, classified under Command Injection. CVSS score: 9.8/10. Published 2026-03-31.
- How severe is CVE-2026-34243?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2026-34243 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.