PT-2026-46259 · Tautulli · Tautulli

Published 2026-06-04 · Updated 2026-06-04 · CVE-2026-43986

Mitre

CVSS v3.1

9.9

Critical

Base vector

AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L

Tautulli is a Python based monitoring and tracking tool for Plex Media Server. Versions prior to 2.17.1 expose a public /image/<hash> route that resolves attacker-controlled entries from image hash lookup and replays them through the same server-side image fetch logic used by authenticated image proxying. A low-privilege guest user can seed a malicious external image URL into this lookup table and then trigger server-side fetches through a fully unauthenticated endpoint. This turns an authenticated SSRF primitive into a persistent unauthenticated SSRF gadget. Once the malicious hash entry exists, any external user can request /image/<hash>.png and cause the PMS or Tautulli host to fetch an arbitrary attacker-chosen URL. Version 2.17.1 patches the issue.

Fix

SSRF

Weakness Enumeration

CWE-918

Related Identifiers

CVE-2026-43986

Affected Products

Tautulli

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-43986 · Security Note
• https://github.com/Tautulli/Tautulli/releases/tag/v2.17.1 · Note
• https://github.com/Tautulli/Tautulli/security/advisories/GHSA-m6j6-rc2c-8vpm · Note