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Description

Tautulli is a Python based monitoring and tracking tool for Plex Media Server. Versions prior to 2.17.1 are vulnerable to remote code execution via the newsletter custom template directory feature. On a fresh install before the setup wizard is completed, all management endpoints are completely unauthenticated. An attacker can create a newsletter agent, point the custom template directory to an attacker-controlled SMB share serving a malicious Mako template, and trigger execution via the newsletter render endpoint, all with zero credentials and no local access to the target system. On a completed install with credentials configured, the same chain is exploitable by any admin. Version 2.17.1 fixes the issue.

PUBLISHED Reserved 2026-04-16 | Published 2026-06-04 | Updated 2026-06-04 | Assigner GitHub_M




HIGH: 8.9CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P

Problem types

CWE-1336: Improper Neutralization of Special Elements Used in a Template Engine

Product status

< 2.17.1
affected

References

github.com/...utulli/security/advisories/GHSA-68qx-mcf5-3jcp exploit

github.com/...utulli/security/advisories/GHSA-68qx-mcf5-3jcp

github.com/Tautulli/Tautulli/releases/tag/v2.17.1

cve.org (CVE-2026-41065)

nvd.nist.gov (CVE-2026-41065)

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