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Vulnerability record · CVE-2026-52835 · published 21 September 2026

CVE-2026-52835: Path traversal vulnerability

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.

7.0 CVSS 4.0 High EPSS 0.59% · top 53.9% CWE-22 · Path traversalCWE-434 · Unrestricted file upload Deferred
7.0CVSS 4.0 base score
0.59%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
4References
21 Sep 2026Last modified by NVD

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
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

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Source: NIST National Vulnerability Database (record CVE-2026-52835), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.