njzjz wenxian up to 0.3.1 BIBTEX File Parser issue_comment.body command injection

Summaryinfo

A vulnerability was found in njzjz wenxian up to 0.3.1. It has been rated as critical. The affected element is an unknown function of the component BIBTEX File Parser. Performing a manipulation of the argument issue_comment.body results in command injection. This vulnerability is cataloged as CVE-2026-34243. It is possible to initiate the attack remotely. There is no exploit available. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability, which was classified as critical, was found in njzjz wenxian up to 0.3.1. This affects an unknown function of the component BIBTEX File Parser. The manipulation of the argument issue_comment.body with an unknown input leads to a command injection vulnerability. CWE is classifying the issue as CWE-77. The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-34243 since 03/26/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1202 according to MITRE ATT&CK.

Applying a patch is able to eliminate this problem.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• njzjz

Name

• wenxian

Version

• 0.3.0
• 0.3.1

Website

• Product: https://github.com/njzjz/wenxian/

CPE 2.3info

• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Discussion