{"id":"CVE-2026-54915","title":"Tautulli is a Python based monitoring and tracking tool for Plex Media Server","summary":"Tautulli is a Python based monitoring and tracking tool for Plex Media Server. Prior to 2.17.2, the unauthenticated /auth/redirect endpoint in plexpy/webauth.py removes forward slashes from the user-controlled redirect_uri parameter but …","severity":"medium","cvss":5.4,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","cwe":["CWE-601"],"vendor":"Tautulli","product":"Tautulli","affected":["Tautulli < 2.17.2"],"published":"2026-09-21","updated":"2026-09-21","sourceUpdated":"2026-09-21T20:17:26.463","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-54915","references":[{"url":"https://github.com/Tautulli/Tautulli/commit/07f9beaa0286f1ab3b5e6be9726c5b2de07ee9dd","label":"security-advisories@github.com"},{"url":"https://github.com/Tautulli/Tautulli/releases/tag/v2.17.2","label":"security-advisories@github.com"},{"url":"https://github.com/Tautulli/Tautulli/security/advisories/GHSA-7c9r-fhj9-87xm","label":"security-advisories@github.com"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-21T19:51:58.878Z","slug":"CVE-2026-54915","body":"## Overview\n\nTautulli is a Python based monitoring and tracking tool for Plex Media Server. Prior to 2.17.2, the unauthenticated /auth/redirect endpoint in plexpy/webauth.py removes forward slashes from the user-controlled redirect_uri parameter but leaves tab, line-feed, and carriage-return characters intact. With the default root HTTP_ROOT configuration, CherryPy HTTPRedirect passes the resulting value to urllib.parse.urljoin, which can resolve the whitespace-bearing path to an attacker-controlled external origin. A user who follows a crafted link can therefore be redirected outside Tautulli for phishing or post-login redirect-flow abuse, while custom non-root HTTP_ROOT configurations are not affected by this bypass. This issue is fixed in version 2.17.2.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":29.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}