CVE-2026-22781

9.8 CRITICAL
Published: January 12, 2026 Modified: January 16, 2026
View on NVD

Description

TinyWeb is a web server (HTTP, HTTPS) written in Delphi for Win32. TinyWeb HTTP Server before version 1.98 is vulnerable to OS command injection via CGI ISINDEX-style query parameters. The query parameters are passed as command-line arguments to the CGI executable via Windows CreateProcess(). An unauthenticated remote attacker can execute arbitrary commands on the server by injecting Windows shell metacharacters into HTTP requests. This vulnerability is fixed in 1.98.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://github.com/maximmasiutin/TinyWeb/security/advisories/GHSA-m779-84h5-72q2
Source: security-advisories@github.com
Third Party Advisory
https://www.masiutin.net/tinyweb-cve-2025-cgi-command-injection.html
Source: security-advisories@github.com
Third Party Advisory

3 reference(s) from NVD

Quick Stats

CVSS v3 Score
9.8 / 10.0
EPSS (Exploit Probability)
0.6%
68th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

Affected Vendors

ritlabs