CVE-2026-22781

CRITICAL

9.8

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.

CVE Details

CVSS v3.1 Score9.8

SeverityCRITICAL

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published1/12/2026

Last Modified1/16/2026

Sourcenvd

Honeypot Sightings0

Affected Products

ritlabs:tinyweb

Weaknesses (CWE)

CWE-78

References

https://github.com/maximmasiutin/TinyWeb/commit/876b7e2887f4ea5be3e18bb2af7313f23a283c96(security-advisories@github.com)

https://github.com/maximmasiutin/TinyWeb/security/advisories/GHSA-m779-84h5-72q2(security-advisories@github.com)

https://www.masiutin.net/tinyweb-cve-2025-cgi-command-injection.html(security-advisories@github.com)

IOC Correlations

No correlations recorded

This product uses data from the NVD API but is not endorsed or certified by the NVD.