Vulnerability · Published Jun 4, 2026 · Assigned by GitHub_M

CVE-2026-43986Tautulli vulnerable to unauthenticated SSRF in /image/<hash> via attacker-seeded image hash replay

Critical 9.9

In plain English

A critical-severity server-side request forgery in Tautulli from Tautulli. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 18% of all known vulnerabilities).

Severity (CVSS 3.1)9.9Critical

Exploit odds (30 days)0.3%top 81.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
Tautulli	Tautulli	< 2.17.1

Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L

References

https://github.com/Tautulli/Tautulli/security/advisories/GHSA-m6j6-rc2c-8vpm x_refsource_CONFIRM
https://github.com/Tautulli/Tautulli/releases/tag/v2.17.1 x_refsource_MISC