CVE-2026-34243 CRITICAL

CVE-2026-34243: wenxian: Command Injection in GitHub Actions Workflow via `issue_comment.body`

Vendor Njzjz
Product wenxian
Weakness CWE-77
Published March 31, 2026
Last update April 2, 2026

CVSS base score

9.8/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

March 31, 2026 CVE published
April 2, 2026 Record updated