CVE-2026-28505

Tautulli is a Python based monitoring and tracking tool for Plex Media Server. Prior to version 2.17.0, the str_eval() function in notification_handler.py implements a sandboxed eval() for notification text templates. The sandbox attempts to restrict callable names by inspecting code.co_names of the compiled code object. However, co_names only contains names from the outer code object. When a lambda expression is used, it creates a nested code object whose attribute accesses are stored in code.co_consts, NOT in code.co_names. The sandbox never inspects nested code objects. This issue has been patched in version 2.17.0.

• CWE-94
• CWE-95

• https://github.com/Tautulli/Tautulli/releases/tag/v2.17.0Release Notes
• https://github.com/Tautulli/Tautulli/security/advisories/GHSA-m62j-gwm9-7p8mExploit, Vendor Advisory

Published

Mar 30, 2026

Last Modified

Jun 17, 2026

Status

Analyzed

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