CVE-2026-34243
CVE-2026-34243 is a critical-severity vulnerability in Njzjz Wenxian with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-77.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- EPSS exploit prediction: 2% (80th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-17522
- Weakness: CWE-77
- Affected product: Njzjz Wenxian
- Published:
- Last modified:
Description
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.
Frequently asked questions
- What is 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.
- How severe is CVE-2026-34243?
- CVE-2026-34243 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2026-34243 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-34243?
- CVE-2026-34243 affects Njzjz Wenxian. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-34243?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- Does CVE-2026-34243 have an EU (EUVD) identifier?
- Yes. CVE-2026-34243 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-17522.
- When was CVE-2026-34243 published?
- CVE-2026-34243 was published on 2026-03-31 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:njzjz:wenxian:*:*:*:*:*:python:*:*
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