TinyWeb is a web server (HTTP, HTTPS) written in Delphi for Win32. Prior to version 2.03, an integer overflow vulnerability in the string-to-integer conversion routine (_Val) allows an unauthenticated remote attacker to bypass Content-Length restrictions and perform HTTP Request Smuggling. This can lead to unauthorized access, security filter bypass, and potential cache poisoning. The impact is critical for servers using persistent connections (Keep-Alive). This issue has been patched in version 2.03.
History

Fri, 06 Mar 2026 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 06 Mar 2026 15:30:00 +0000

Type Values Removed Values Added
First Time appeared Maximmasiutin
Maximmasiutin tinyweb
Vendors & Products Maximmasiutin
Maximmasiutin tinyweb

Fri, 06 Mar 2026 03:30:00 +0000

Type Values Removed Values Added
Description TinyWeb is a web server (HTTP, HTTPS) written in Delphi for Win32. Prior to version 2.03, an integer overflow vulnerability in the string-to-integer conversion routine (_Val) allows an unauthenticated remote attacker to bypass Content-Length restrictions and perform HTTP Request Smuggling. This can lead to unauthorized access, security filter bypass, and potential cache poisoning. The impact is critical for servers using persistent connections (Keep-Alive). This issue has been patched in version 2.03.
Title TinyWeb: Integer Overflow in `_Val` (HTTP Request Smuggling)
Weaknesses CWE-190
CWE-444
References
Metrics cvssV4_0

{'score': 9.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-03-06T02:51:59.046Z

Updated: 2026-03-06T16:10:28.611Z

Reserved: 2026-02-27T20:57:47.708Z

Link: CVE-2026-28497

cve-icon Vulnrichment

Updated: 2026-03-06T16:00:30.671Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-03-06T04:16:07.990

Modified: 2026-03-09T13:36:08.413

Link: CVE-2026-28497

cve-icon Redhat

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