How broadly exploitable is this vulnerability?

The vulnerability is remotely exploitable over HTTP/HTTPS wherever TinyWeb exposes CGI endpoints. If the affected CGI executable accepts dangerous flags and TinyWeb does not strictly filter parameters, an unauthenticated attacker on the network can attempt exploitation.

Does an attacker need local or authenticated access to exploit this issue?

No. Exploitation can be carried out by sending crafted HTTP requests to vulnerable CGI endpoints; no local system access or prior authentication is required, although some configurations may restrict access to specific IP ranges.

What is the safest general fix pattern?

The safest pattern is to ensure that CGI invocation never interprets user-supplied data as command-line flags or structural arguments. This means enforcing strict parameter whitelisting, separating configuration from user input, and using invocation mechanisms that pass arguments as data only (e.g., environment variables or structured interfaces) rather than constructing shell-like command lines.

Severity:

CRITICAL RISK

(9.8)

Command Injection via CGI Parameters (CWE-78) in TinyWeb Web Server

CVE-2026-27613

Published:

Feb 25, 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-78

CRITICAL RISK

CRITICAL

(9.9)

Command Injection in MCP Stdio Configuration Validation (CWE-78) in WeKnora

Remote Code Execution

March 7, 2026

CWE-89

CRITICAL RISK

CRITICAL

(9.9)

SQL Injection via PostgreSQL Array/Row Expressions (CWE-89) in WeKnora Query Engine

Remote Code Execution via SQL Injection on the Database Server

March 7, 2026

Vulnerability Type

Category:

Command Injection / CGI Argument Injection

CWE:

CWE-78;CWE-88

Impact:

Remote Code Execution and Source Code Disclosure

Severity:

CRITICAL RISK

(9.8)

CVSS Version:

3.1

Vulnerability Type

Category:

Command Injection / CGI Argument Injection

CWE:

CWE-78;CWE-88

Impact:

Remote Code Execution and Source Code Disclosure

Severity:

CRITICAL RISK

(9.8)

CVSS Version:

3.1

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Ask AI for summary of CodeAnt

Command Injection via CGI Parameters (CWE-78) in TinyWeb Web Server

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

(9.9)

Command Injection in MCP Stdio Configuration Validation (CWE-78) in WeKnora

CRITICAL RISK

CRITICAL

(9.9)

SQL Injection via PostgreSQL Array/Row Expressions (CWE-89) in WeKnora Query Engine

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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