CVE Catalog

CVE-2026-108725

MediumCVSS 5.4
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.22%

11th percentile - higher than 11% of all known CVEs

Summary

Cheshire Cat AI core through 2.0.23 contains a stored cross-site scripting vulnerability in the uploads plugin that allows authenticated users to upload HTML files via POST /uploads without type restrictions. Attackers can send the public GET /uploads/{path} URL to a signed-in victim, executing script in the application origin with the victim's access_token cookie, including administrators.

Risk Assessment

Attackers can execute malicious scripts in the victim's browser context, hijacking sessions or performing unauthorized actions on behalf of the victim. This may lead to data theft or privilege escalation.

Recommendation

Update Cheshire Cat AI core to a version later than 2.0.23 if available, or restrict HTML file uploads and apply content escaping. Educate users about the risks of clicking unknown links.

Related vulnerabilities

Original NVD description (English source)

Cheshire Cat AI core through 2.0.23 contains a stored cross-site scripting vulnerability in the uploads plugin that allows authenticated users to upload HTML files via POST /uploads without type restrictions. Attackers can send the public GET /uploads/{path} URL to a signed-in victim, executing script in the application origin with the victim's access_token cookie, including administrators.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS