CVE-2026-28497

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.

CVSS v3 9.1 CRITICAL

9.1^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/maximmasiutin/TinyWeb/commit/d2edd0322c3d74beee0a6c0191299b8946695d4e	Patch
https://github.com/maximmasiutin/TinyWeb/security/advisories/GHSA-rp8j-cx7r-mw9f	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:ritlabs:tinyweb:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-03-06 04:16

Updated : 2026-03-16 15:37

NVD link : CVE-2026-28497

Mitre link : CVE-2026-28497

CVE.ORG link : CVE-2026-28497

JSON object : View

Products Affected

ritlabs

tinyweb

CWE

CWE-190

Integer Overflow or Wraparound

CWE-444

Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

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