CVE-2026-31831 Details.
Tautulli <= 2.16.1 - Path Traversal
Atlas does not check this one. Works by exploiting the flaw.
The only reliable test for this one is to try the weakness itself, which can disturb the site. Atlas does not do that, so it does not run this check.
About CVE-2026-31831. What It Means.
Tautulli is a monitoring and tracking tool for Plex Media Server. Prior to version 2.17.0, the `/newsletter/image/images` endpoint joins user-controlled path segments onto the newsletter image directory without containment validation. Authentication is not required for this endpoint, allowing unauthenticated attackers to perform directory traversal and read arbitrary files accessible to the server process. Reading `config/config.ini` discloses the API key, the hashed admin p…
Affected Product. What Is Hit.
- Vendor
- tautulli
- Product
- Tautulli
References. Where To Read More.
FAQ
Common Questions.
Tautulli <= 2.16.1 - Path Traversal. Tautulli is a monitoring and tracking tool for Plex Media Server. Prior to version 2.17.0, the `/newsletter/image/images` endpoint joins user-controlled path segments onto the newsletter image directory without containment validation. Authentication is not required for this endpoint, allowing unauthenticated attackers to perform directory traversal and read arbitrary files accessible to the server process. Reading `config/config.ini` discloses the API key, the hashed admin p…
No. The only reliable test for this one is to try the weakness itself, which can disturb the site. Atlas does not do that, so it does not run this check. The facts about CVE-2026-31831 are on this page, and you can request a demo to see how Brandefense watches your whole external attack surface.
CVE-2026-31831 is not on the CISA Known Exploited Vulnerabilities list at the time of writing, but it is still worth fixing.
Update Tautulli to the latest version from the vendor, or follow the vendor's advice to switch off the affected feature. Vendor links are listed on this page when they are known.
This page lists the public facts about CVE-2026-31831. Atlas does not run a check for it, so nothing here says whether a particular site is affected.