RCE in Maximmasiutin Tinyweb
CVE-2026-22781
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 argume…
Vulnerability class: Command Injection (OS Command Injection)
EPSS: 0.022 (80.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Maximmasiutin Tinyweb — versions < 1.98
- Ritlabs Tinyweb
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Third Party Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-22781?
- CVE-2026-22781 is a critical-severity vulnerability in Maximmasiutin Tinyweb, classified under OS Command Injection. CVSS score: 9.8/10. Published 2026-01-12.
- How severe is CVE-2026-22781?
- Critical severity. CVSS v3 base score is 9.8 out of 10.