by Kastro
Paper/Archive/CVE-2026-22781

CVE-2026-22781

maximmasiutin TinyWeb — TinyWeb CGI Command Injection

EPSS 2%CVSS 10.0
critical.is priorityof 100
47
CVSS 10.0 (CNA)10.0 / 10 × 3030.0Not in CISA KEV+300.0EPSS percentile 84.3.843 × 2016.9No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
TinyWeb< 1.98–CNA

Scores by source

GitHub_M (CNA)10.0CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refgithub.com/maximmasiutin/TinyWeb/security/advisories/GHSA-m779-84h5-72q2refgithub.com/maximmasiutin/TinyWeb/commit/876b7e2887f4ea5be3e18bb2af7313f23a283c96refmasiutin.net/tinyweb-cve-2025-cgi-command-injection.html