CVE-2026-52835: Path Traversal

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.

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Weakness Type (CWE)

CWE-22 Path Traversal

CWE-434 Unrestricted Upload

References

Other References

https://github.com/Tautulli/Tautulli/commit/8c7c1a5ab09a6cca00aec995df07ce24680e7f31 https://github.com/Tautulli/Tautulli/releases/tag/v2.17.2 https://github.com/Tautulli/Tautulli/security/advisories/GHSA-8ww5-pp25-3jm8 https://github.com/Tautulli/Tautulli/security/advisories/GHSA-8ww5-pp25-3jm8

Frequently Asked Questions

What is CVE-2026-52835? +

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.

How do I check if I'm vulnerable to CVE-2026-52835? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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