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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.

PUBLISHED Reserved 2026-02-27 | Published 2026-03-06 | Updated 2026-03-06 | Assigner GitHub_M




CRITICAL: 9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Problem types

CWE-190: Integer Overflow or Wraparound

CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

Product status

< 2.03
affected

References

github.com/...inyWeb/security/advisories/GHSA-rp8j-cx7r-mw9f

github.com/...ommit/d2edd0322c3d74beee0a6c0191299b8946695d4e

cve.org (CVE-2026-28497)

nvd.nist.gov (CVE-2026-28497)

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