CVE-2026-35031

EIP tracks 1 public exploit for CVE-2026-35031. PoCs published by keraattin.

AI-analyzed exploit summary This repository contains a Python script that detects Jellyfin media server instances vulnerable to CVE-2026-35031, a path traversal vulnerability in the subtitle upload endpoint that can lead to RCE. The script checks the server version and endpoint accessibility but does not include exploit code.

Jellyfin is an open source self hosted media server. Versions prior to 10.11.7 contain a vulnerability chain in the subtitle upload endpoint (POST /Videos/{itemId}/Subtitles), where the Format field is not validated, allowing path traversal via the file extension and enabling arbitrary file write. This arbitrary file write can be chained into arbitrary file read via .strm files, database extraction, admin privilege escalation, and ultimately remote code execution as root via ld.so.preload. Exploitation requires an administrator account or a user that has been explicitly granted the "Upload Subtitles" permission. This issue has been fixed in version 10.11.7. If users are unable to upgrade immediately, they can grant non-administrator users Subtitle upload permissions to reduce attack surface.