Is this vulnerability remotely exploitable over the internet?

Yes. Any attacker who can reach the TinyWeb HTTP/HTTPS interface and trigger a vulnerable CGI endpoint can attempt exploitation without prior authentication.

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

No local or authenticated access is required. The attacker only needs the ability to send crafted HTTP requests to a CGI-enabled TinyWeb instance that is running a vulnerable version.

What is the safest general fix pattern for developers or integrators using CGI?

The safest pattern is to eliminate direct command-line construction from user input and instead use APIs that treat user data strictly as arguments, combined with strict input validation and whitelisting for all CGI parameters. Avoid invoking shells or wrappers that interpret special characters whenever possible.

Severity:

CRITICAL RISK

(9.8)

OS Command Injection (CWE-78) in TinyWeb HTTP Server CGI Parameter Handling

CVE-2026-22781

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-306

CRITICAL RISK

CRITICAL

(9.8)

Missing Authentication for Forgot-Password Email Change API (CWE-306)

Account Takeover / Loss of Account Control

February 17, 2026

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in node-sonos-http-api TTS Provider for macOS

Remote Code Execution on the Server Host

February 17, 2026

Vulnerability Type

Category:

OS Command Injection

CWE:

CWE-78

Impact:

Remote Code Execution

Severity:

CRITICAL RISK

(9.8)

CVSS Version:

3.1

Vulnerability Type

Category:

OS Command Injection

CWE:

CWE-78

Impact:

Remote Code Execution

Severity:

CRITICAL RISK

(9.8)

CVSS Version:

3.1

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Ask AI for summary of CodeAnt

OS Command Injection (CWE-78) in TinyWeb HTTP Server CGI Parameter 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

CRITICAL RISK

CRITICAL

(9.8)

Missing Authentication for Forgot-Password Email Change API (CWE-306)

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in node-sonos-http-api TTS Provider for macOS

Vulnerability Type

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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