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CVE-2026-31831— Tautulli: Unauthenticated Path Traversal in `/newsletter/image/images` endpoint

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 2.17.0之前版本存在安全漏洞，该漏洞源于/newsletter/image/images API端点存在路径遍历问题，可能导致任意文件读取。

AI Predicted 7.5 Difficulty: Easy EPSS 1.87% · P79

Public Exploits 1

Nuclei · 1 CVE-2026-31831.yaml [template]
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I. Basic Information for CVE-2026-31831

Vulnerability Information
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Vulnerability Title
Tautulli: Unauthenticated Path Traversal in `/newsletter/image/images` endpoint
Source: CVE Program / CVE List V5
Vulnerability Description
Tautulli is a Python based monitoring and tracking tool for Plex Media Server. Prior to version 2.17.0, the /newsletter/image/images API endpoint is vulnerable to path traversal, allowing unauthenticated attackers to read arbitrary files from the application server's filesystem. This issue has been patched in version 2.17.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
相对路径遍历
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 2.17.0之前版本存在安全漏洞，该漏洞源于/newsletter/image/images API端点存在路径遍历问题，可能导致任意文件读取。
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 < 2.17.0 -

II. Public POCs for CVE-2026-31831

# POC Description Source Link Shenlong Link
1 Tautulli is a monitoring and tracking tool for Plex Media Server. Prior to version 2.17.0, the `/newsletter/image/images` endpoint joins user-controlled path segments onto the newsletter image directory without containment validation. Authentication is not required for this endpoint, allowing unauthenticated attackers to perform directory traversal and read arbitrary files accessible to the server process. Reading `config/config.ini` discloses the API key, the hashed admin password, the JWT token secret, and the Plex Media Server token. Version 2.17.0 fixes this issue. https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-31831.yaml POC Details
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III. Intelligence Information for CVE-2026-31831

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Vendor Pages for CVE-2026-31831 (1)

Same Patch Batch · Tautulli · 2026-03-30 · 5 CVEs total

CVE-2026-31799 4.9 MEDIUM Tautulli: SQL Injection in get_home_stats API endpoint via unsanitised filter parameters
CVE-2026-31804 4.0 MEDIUM Tautulli: Unauthenticated pms_image_proxy endpoint proxies arbitrary HTTP requests through
CVE-2026-32275 Tautulli: Unsanitized JSONP callback parameter allows cross-origin script injection and AP
CVE-2026-28505 Tautulli: RCE via eval() sandbox bypass using lambda nested scope to escape co_names white

IV. Related Vulnerabilities

Same product: Tautulli
Same vendor: Tautulli
Same weakness: CWE-23

V. Comments for CVE-2026-31831

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