CVE-2026-49995 Tautulli: Stored Cross-Site Scripting (XSS) in the newsletter
An attacker with API access can inject malicious scripts into the newsletter configuration, leading to script execution when an administrator views the settings.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-49995?
CVE-2026-49995 is a medium-severity cross-site scripting vulnerability in Tautulli, published on 21 Sep 2026. An attacker needs administrator access to exploit it, 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. Prior to 2.17.2, the newsletter cron field stored in the newsletters table is inserted by data/interfaces/default/newsletter_config.html into a JavaScript string without safe JSON encoding. An administrator or caller with the Tautulli API key can store a crafted cron value, and an administrator who later opens the newsletter configuration modal passively triggers script execution in the Tautulli web context. The stored value persists in the database and can continue to execute after credential rotation until it is removed. This issue is fixed in version 2.17.2.
Weakness: CWE-79
Which versions are affected by CVE-2026-49995?
How do I fix CVE-2026-49995?
No fix has been published for CVE-2026-49995 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-49995 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-49995 exists.
Sources
Also known as GHSA-r6pg-vqxj-v75j.