Is this vulnerability remotely exploitable?

It can be, depending on how Tautulli is exposed. If attackers can remotely create or modify notification templates, or influence fields that end up in `str_eval()`, they may trigger arbitrary code execution remotely. In more locked-down setups, exploitability may be limited to authenticated or local users.

What level of access does an attacker need to exploit this issue?

The attacker must be able to control, directly or indirectly, the expressions passed into the `str_eval()` notification template mechanism. This typically requires some degree of configuration or template-editing capability within Tautulli or an integrated system that feeds these templates.

What is the safest general fix pattern for developers?

Remove or replace direct dynamic code evaluation of templates with a non-Turing-complete templating system, exposing only a well-defined set of safe variables and filters. Avoid ad-hoc evaluation sandboxes and do not rely on bytecode-level name filtering to enforce security boundaries.

Severity:

CRITICAL RISK

(10.0)

Improper Code Evaluation (CWE-94) in Tautulli Notification Template Sandbox

CVE-2026-28505

Published:

Mar 30, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

Remote Code Execution on the Router

April 6, 2026

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Remote Code Execution on Router Firmware

April 6, 2026

Vulnerability Type

Category:

Improper Code Execution Control

CWE:

CWE-94;CWE-95

Impact:

Arbitrary Code Execution within the Tautulli Process

Severity:

CRITICAL RISK

(10.0)

CVSS Version:

3.1

Vulnerability Type

Category:

Improper Code Execution Control

CWE:

CWE-94;CWE-95

Impact:

Arbitrary Code Execution within the Tautulli Process

Severity:

CRITICAL RISK

(10.0)

CVSS Version:

3.1

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Improper Code Evaluation (CWE-94) in Tautulli Notification Template Sandbox

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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