---
cve: "CVE-2026-43986"
severity: "CRITICAL"
cvss: 9.9
epss: "0.3%"
vendor: "Tautulli"
kev: false
exploited: false
published: "2026-06-04 14:33:36"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-24T07:11:06+02:00"
---

# CVE-2026-43986

> 9.9 CRITICAL · 🧪 PoC

## Beschreibung

Tautulli is a Python based monitoring and tracking tool for Plex Media Server. Versions prior to 2.17.1 expose a public `/image/` 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/.png` and cause the PMS or Tautulli host to fetch an arbitrary attacker-chosen URL. Version 2.17.1 patches the issue.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |
| S Scope | Verändert | bad |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Gering | warn |

## Patch verfügbar (OSV)

- d7b8147944c745c9dd566ac7839ed21f941d6d1d (Commit)

## Referenzen

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

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-43986) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_