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TI-2026-39684 Aliases CVE-2026-54915

Tautulli: Open redirect via whitespace bypass in /auth/redirect

Priority MEDIUM 58CWE-601Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Spoofing
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-601.

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00257 17th percentileScored 2026-11-07
Fix Fixed Tautulli (Tautulli): 2.17.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
TautulliTautullibefore 2.17.22.17.2Patch availableCNA
  • Tautulli VendorTautulli Affected before 2.17.2 Fixed in 2.17.2 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:tautulli:tautulli:*:*:*:*:*:*:*:*——Tautulli
  • cpe:2.3:a:tautulli:tautulli:*:*:*:*:*:*:*:* Versions — — ·Tautulli

Remediation

  • Fix · CNA Tautulli (Tautulli) Fixed in 2.17.2

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-54915

References

Other 3

  • TI-2026-29704 Tautulli Vulnerable to Unauthenticated/Authenticated Remote Code Execution via Newsletter Custom Template Directory CVSS 4.0HIGH 8.9
  • TI-2026-24384 Tautulli: Unauthenticated Path Traversal in `/newsletter/image/images` endpoint CVSS 4.0HIGH 8.7
  • TI-2026-32030 Tautulli vulnerable to unauthenticated SSRF in /image/<hash> via attacker-seeded image hash replay CVSS 3.1CRITICAL 9.9
  • TI-2025-36419 Tautulli vulnerable to Unauthenticated Path Traversal in `real_pms_image_proxy` CVSS 3.1HIGH 8.6
  • TI-2026-32028 Tautulli has stored XSS in logFile via guest-controlled log_js_errors input CVSS 3.1HIGH 8.9
  • TI-2026-32029 Taultulli has CSRF in /configUpdate via missing anti-CSRF and method restriction that allows admin credential takeover CVSS 3.1HIGH 8.8
See all 19 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences