CVE-2026-54915 (GCVE-0-2026-54915)
Vulnerability from cvelistv5 – Published: 2026-09-21 19:09 – Updated: 2026-09-24 22:33
VLAI
EPSS
VEX
Title
Tautulli: Open redirect via whitespace bypass in /auth/redirect
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 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.
Severity
5.4 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-24 22:32 UTC
CWE
- CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/Tautulli/Tautulli/security/adv… | x_refsource_CONFIRM |
| https://github.com/Tautulli/Tautulli/commit/07f9b… | x_refsource_MISC |
| https://github.com/Tautulli/Tautulli/releases/tag… | x_refsource_MISC |
Impacted products
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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