Is this vulnerability remotely exploitable?

Yes, if an attacker can reach a Valkey instance (directly or via an application) and execute Lua scripts or cause script errors, they can attempt to inject data into response streams over that connection.

What level of access does an attacker need?

The attacker needs the ability to issue Lua scripting commands or indirectly control script inputs that the server executes. They do not necessarily need administrative privileges, but they must be able to trigger script execution that results in controlled error messages.

What is the safest general fix pattern?

The safest pattern is to strictly sanitize and encode all error messages and script outputs before they are included in protocol responses, ensuring that special characters such as null bytes cannot alter response framing. Additionally, ensure the response parser on the client side correctly handles and validates message boundaries.

Severity:

HIGH RISK

(8.5)

Response Injection via Improper Neutralization (CWE-74) in Valkey Lua Scripting Error Handling

CVE-2025-67733

Published:

Feb 23, 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:

Injection

CWE:

CWE-74

Impact:

Response Tampering and Data Integrity Compromise

Severity:

HIGH RISK

(8.5)

CVSS Version:

3.1

Vulnerability Type

Category:

Injection

CWE:

CWE-74

Impact:

Response Tampering and Data Integrity Compromise

Severity:

HIGH RISK

(8.5)

CVSS Version:

3.1

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Ask AI for summary of CodeAnt

Response Injection via Improper Neutralization (CWE-74) in Valkey Lua Scripting Error Handling

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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