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Critical · 9.3 CVE-2026-28497 EUVD-2026-9969

TinyWeb: Integer Overflow in `_Val` (HTTP Request Smuggling)

Published Mar 6, 2026 · Updated Mar 6, 2026 · Assigned by GitHub_M

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.

Affected products

VendorProductAffectedFixed
maximmasiutin TinyWeb < 2.03 —

References