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TI-2026-22767 Aliases CVE-2026-28505

Tautulli: RCE via eval() sandbox bypass using lambda nested scope to escape co_names whitelist check

Priority HIGH 68CWE-94Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
High
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-94.

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 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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00494 42nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed Tautulli (Tautulli): 2.17.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
TautulliTautullibefore 2.17.02.17.0Patch availableCNA
  • Tautulli VendorTautulli Affected before 2.17.0 Fixed in 2.17.0 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:tautulli:tautulli:*:*:*:*:*:*:*:*before 2.17.0VulnerableTautulli
  • cpe:2.3:a:tautulli:tautulli:*:*:*:*:*:*:*:* Versions before 2.17.0 Vulnerable ·Tautulli

Remediation

  • Fix · CNA Tautulli (Tautulli) Fixed in 2.17.0

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-28505

References

Exploit 1

Other 1

  • TI-2026-24384 Tautulli: Unauthenticated Path Traversal in `/newsletter/image/images` endpoint CVSS 4.0HIGH 8.7
  • TI-2025-36419 Tautulli vulnerable to Unauthenticated Path Traversal in `real_pms_image_proxy` CVSS 3.1HIGH 8.6
  • TI-2025-36418 Tautulli vulnerable to Unauthenticated Path Traversal in `/image` endpoint CVSS 3.1HIGH 8.6
  • TI-2026-24354 Tautulli: SQL Injection in get_home_stats API endpoint via unsanitised filter parameters CVSS 3.1MEDIUM 4.9
  • TI-2019-14295 In Tautulli 2.1.9, CSRF in the /shutdown URI allows an attacker to shut down the remote… CVSS 3.1MEDIUM 6.5
  • TI-2025-36421 Tautulli vulnerable to Authenticated Remote Code Execution via Command Injection CVSS 3.1HIGH 8.1
See all 10 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences