How broadly exploitable is this vulnerability?

Exploitability depends on who can influence EnvoyExtensionPolicy Lua scripts. In environments where only highly trusted operators can define or change these scripts, exposure is more limited; in multi-tenant or less restricted environments, the risk extends to any party who can introduce or modify Lua extensions.

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

An attacker needs the ability to author, alter, or cause execution of Lua scripts within EnvoyExtensionPolicy, either directly via control-plane APIs or indirectly through a compromised administrative workflow or CI/CD pipeline.

What is the safest general fix pattern?

The safest pattern is to harden the extension model by sandboxing Lua execution, preventing scripts from reaching control-plane credentials or other sensitive secrets, and strictly limiting who can deploy or modify extension policies.

Severity:

HIGH RISK

(8.8)

Lua Script Code Injection (CWE-94) in Envoy Gateway EnvoyExtensionPolicy

CVE-2026-22771

Published:

Jan 12, 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:

Code Injection / Script Abuse

CWE:

CWE-94

Impact:

Credential and Secret Compromise via Script-Based Code Injection

Severity:

HIGH RISK

(8.8)

CVSS Version:

3.1

Vulnerability Type

Category:

Code Injection / Script Abuse

CWE:

CWE-94

Impact:

Credential and Secret Compromise via Script-Based Code Injection

Severity:

HIGH RISK

(8.8)

CVSS Version:

3.1

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Lua Script Code Injection (CWE-94) in Envoy Gateway EnvoyExtensionPolicy

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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