Vulnerability Description
Tautulli is a Python based monitoring and tracking tool for Plex Media Server. Prior to version 2.17.0, the /pms_image_proxy endpoint accepts a user-supplied img parameter and forwards it to Plex Media Server's /photo/:/ transcode transcoder without authentication and without restricting the scheme or host. The endpoint is intentionally excluded from all authentication checks in webstart.py, any value of img beginning with http is passed directly to Plex, this causes the Plex Media Server process, which typically runs on the same host or internal network as Tautulli, with access to RFC-1918 address space, to issue an outbound HTTP request to any attacker-specified URL. This issue has been patched in version 2.17.0.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Tautulli | Tautulli | < 2.17.0 |
Related Weaknesses (CWE)
References
- https://github.com/Tautulli/Tautulli/releases/tag/v2.17.0Release Notes
- https://github.com/Tautulli/Tautulli/security/advisories/GHSA-qj2f-4c4p-wv97Vendor AdvisoryExploit
FAQ
What is CVE-2026-31804?
CVE-2026-31804 is a vulnerability with a CVSS score of 4.0 (MEDIUM). Tautulli is a Python based monitoring and tracking tool for Plex Media Server. Prior to version 2.17.0, the /pms_image_proxy endpoint accepts a user-supplied img parameter and forwards it to Plex Medi...
How severe is CVE-2026-31804?
CVE-2026-31804 has been rated MEDIUM with a CVSS base score of 4.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-31804?
Check the references section above for vendor advisories and patch information. Affected products include: Tautulli Tautulli.