CVE-2026-52835 Tautulli: Path traversal / arbitrary file write via unsanitized upload filename in import_config and import_database
An attacker with API access can exploit path traversal in Tautulli to write arbitrary files, potentially leading to code execution or service disruption.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-52835?
CVE-2026-52835 is a high-severity path traversal vulnerability in Tautulli, published on 21 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
Tautulli is a Python based monitoring and tracking tool for Plex Media Server. Prior to 2.17.2, the import_config handler and the database_file branch of import_database in plexpy/webserve.py join the attacker-controlled config_file.filename or database_file.filename directly to CACHE_DIR without basename reduction or a containment check. An administrator or caller with the instance API key can submit a multipart filename containing parent-directory segments, causing the upload to be created or overwritten outside CACHE_DIR before file-content validation runs. The write is limited to paths permitted to the Tautulli process, but it can enable configuration tampering, service disruption, or code execution. This issue is fixed in version 2.17.2.
Which versions are affected by CVE-2026-52835?
How do I fix CVE-2026-52835?
No fix has been published for CVE-2026-52835 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-52835 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-52835 exists.
Sources
Also known as GHSA-8ww5-pp25-3jm8.