CVE-2026-43985 Taultulli has CSRF in /configUpdate via missing anti-CSRF and method restriction that allows admin credential takeover
Attackers can hijack Tautulli admin accounts via CSRF by tricking admins into visiting malicious pages that overwrite credentials.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-43985?
CVE-2026-43985 is a high-severity vulnerability in Tautulli, published on 4 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Tautulli is a Python based monitoring and tracking tool for Plex Media Server. Versions prior to 2.17.1 expose `configUpdate` as a state-changing administrator endpoint, but the route does not enforce `POST` and does not use any anti-CSRF token. In the default form and JWT-based authentication mode, the administrator session cookie is issued with `SameSite=Lax`, which still permits top-level cross-site navigation requests. An attacker can exploit this by luring a logged-in administrator to a malicious page that submits a cross-site request to `/configUpdate` and overwrites the local administrator username and password. The attacker can then sign in directly with the chosen credentials and take over the Tautulli administrative interface. Version 2.17.1 patches the issue.
Weakness: CWE-352
Which versions are affected by CVE-2026-43985?
How do I fix CVE-2026-43985?
No fix has been published for CVE-2026-43985 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-43985 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-43985 exists.
Sources
Also known as GHSA-v622-pmjj-gpx3.