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CVE-2026-43985— Taultulli has CSRF in /configUpdate via missing anti-CSRF and method restriction that allows admin credential takeover

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configUpdate端点未强制POST方法且未使用反CSRF令牌，管理员会话cookie使用SameSite=Lax，允许攻击者通过跨站请求覆盖管理员用户名和密码。

CVSS 8.8 · High EPSS 0.22% · P12

Affected Version Matrix 1

VendorProduct Version RangeStatus
Tautulli Tautulli < 2.17.1 affected
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I. Basic Information for CVE-2026-43985

Vulnerability Information
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Vulnerability Title
Taultulli has CSRF in /configUpdate via missing anti-CSRF and method restriction that allows admin credential takeover
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 `configUpdate` as a state-changing administrator endpoint, but the route does not enforce `POST` and does not use any anti-CSRF token. In the default form and JWT-based authentication mode, the administrator session cookie is issued with `SameSite=Lax`, which still permits top-level cross-site navigation requests. An attacker can exploit this by luring a logged-in administrator to a malicious page that submits a cross-site request to `/configUpdate` and overwrites the local administrator username and password. The attacker can then sign in directly with the chosen credentials and take over the Tautulli administrative interface. Version 2.17.1 patches the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨站请求伪造(CSRF)
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configUpdate端点未强制POST方法且未使用反CSRF令牌，管理员会话cookie使用SameSite=Lax，允许攻击者通过跨站请求覆盖管理员用户名和密码。
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-2026-43985

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 6795 chars
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III. Intelligence Information for CVE-2026-43985

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Vendor Advisories for CVE-2026-43985 (1)

Vendor Pages for CVE-2026-43985 (1)

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

CVE-2026-43986 9.9 CRITICAL Tautulli vulnerable to unauthenticated SSRF in /image/<hash> via attacker-seeded image has
CVE-2026-43984 8.9 HIGH Tautulli has stored XSS in logFile via guest-controlled log_js_errors input
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-352

V. Comments for CVE-2026-43985

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