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TI-2026-36826 Aliases CVE-2026-49995

Tautulli: Stored Cross-Site Scripting (XSS) in the newsletter

Priority MEDIUM 55CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Cross-site scripting
Confidentiality · integrity · availability
None · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

Tautulli is a Python based monitoring and tracking tool for Plex Media Server. Prior to 2.17.2, the newsletter cron field stored in the newsletters table is inserted by data/interfaces/default/newsletter_config.html into a JavaScript string without safe JSON encoding. An administrator or caller with the Tautulli API key can store a crafted cron value, and an administrator who later opens the newsletter configuration modal passively triggers script execution in the Tautulli web context. The stored value persists in the database and can continue to execute after credential rotation until it is removed. This issue is fixed in version 2.17.2.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00602 49th 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-2026-49995

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