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

Quick assessment

Affected
Tautulli Tautulli
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Tautulli是Tautulli开源的一款用于监控Plex Media Server（媒体服务器）的应用程序。 Tautulli 2.17.1之前版本存在安全漏洞，该漏洞源于公开/image/<hash>路由解析攻击者控制的条目并触发服务器端图像获取，低权限用户可植入恶意URL，导致持久化未认证服务端请求伪造。

CVSS 9.9 · Critical EPSS 0.43% · P35

Affected Version Matrix 1

VendorProduct Version RangeStatus
Tautulli Tautulli < 2.17.1 affected
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I. Basic Information for CVE-2026-43986

Vulnerability Information
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Vulnerability Title
Tautulli vulnerable to unauthenticated SSRF in /image/<hash> via attacker-seeded image hash replay
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
Tautulli 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Tautulli是Tautulli开源的一款用于监控Plex Media Server（媒体服务器）的应用程序。 Tautulli 2.17.1之前版本存在安全漏洞，该漏洞源于公开/image/<hash>路由解析攻击者控制的条目并触发服务器端图像获取，低权限用户可植入恶意URL，导致持久化未认证服务端请求伪造。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Tautulli Tautulli < 2.17.1 -

II. Public POCs for CVE-2026-43986

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 5635 chars
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III. Intelligence Information for CVE-2026-43986

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Vendor Advisories for CVE-2026-43986 (1)

Vendor Pages for CVE-2026-43986 (1)

Same Patch Batch · Tautulli · 2026-06-04 · 5 CVEs total

CVE-2026-43984 8.9 HIGH Tautulli has stored XSS in logFile via guest-controlled log_js_errors input
CVE-2026-43985 8.8 HIGH Taultulli has CSRF in /configUpdate via missing anti-CSRF and method restriction that allo
CVE-2026-41065 Tautulli Vulnerable to Unauthenticated/Authenticated Remote Code Execution via Newsletter
CVE-2026-40605 Tautulli Vulnerable to Authenticated Path Traversal in Cache Deletion API

IV. Related Vulnerabilities

Same product: Tautulli
Same vendor: Tautulli
Same weakness: CWE-918

V. Comments for CVE-2026-43986

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