CRITICALVulnerability
Verified
Global
NVD CRITICAL: CVE-2026-28505 — Tautulli is a Python based monitoring and tracking tool for Plex Media Server. P...
Monday, March 30, 2026 at 08:16 PM UTC·Source: NIST NVD
Updated: Thursday, April 2, 2026 at 05:46 PM UTC
Executive Summary
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 lamb
Analysis
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.
CVSS Score: 10. Published: 2026-03-30T20:16:20.180.