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PatchSiren cyber security CVE debrief

CVE-2026-40605 Tautulli CVE debrief

CVE-2026-40605 is a path traversal vulnerability in Tautulli, a Python-based monitoring and tracking tool for Plex Media Server. Prior to version 2.17.1, an authenticated API access can delete directories outside the configured cache path, leading to arbitrary data loss and service disruption. The vulnerability has a CVSS score of 5.7 and is classified as MEDIUM severity. The issue was fixed in version 2.17.1.

Vendor
Tautulli
Product
Unknown
CVSS
MEDIUM 5.7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-04
Original CVE updated
2026-07-22
Advisory published
2026-06-04
Advisory updated
2026-07-22

Who should care

Users of Tautulli version prior to 2.17.1 should update to the latest version to prevent potential data loss and service disruption.

Technical summary

The vulnerability is caused by a path traversal issue in the cache deletion endpoint of Tautulli. This allows an authenticated API user to delete directories outside the configured cache path.

Defensive priority

High

Recommended defensive actions

  • Update Tautulli to version 2.17.1 or later.
  • Restrict API access to trusted users and networks.
  • Monitor cache directory for unauthorized changes.

Evidence notes

The vulnerability was reported and fixed by the Tautulli developers. The fix is available in version 2.17.1.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-40605 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-40605

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-40605 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-40605

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.