Critical 9.8Published Jan 12, 2026

CVE-2026-22781TinyWeb is a web server (HTTP, HTTPS) written in Delphi for Win32.

Updated under an hour ago (2026-10-19 07:20 UTC)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for ritlabs tinyweb

Exploited in the last 30 days

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.

CVSS: 9.8 CRITICAL (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-78
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Analyzed
Record last updated: Jun 17, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

ritlabs tinyweb ritlabs:tinyweb	before 1.98	NVD

References

https://github.com/maximmasiutin/TinyWeb/commit/876b7e2887f4ea5be3e18bb2af7313f23a283c96patch
https://github.com/maximmasiutin/TinyWeb/security/advisories/GHSA-m779-84h5-72q2third-party-advisory
https://www.masiutin.net/tinyweb-cve-2025-cgi-command-injection.htmlthird-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.