CVE-2026-28497

CRITICAL EPSS 37.0%
Published Mar 6, 20263mo ago · Modified Jun 17, 20261w ago
9.3 CVSS 4.0
Critical
Find Similar
Published Mar 6, 2026 3mo ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
9.3
Exploitability
—
Impact
—
Vector string
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
37.0% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 2

CWE-190 Integer Overflow or Wraparound Numeric Error
CWE-444

Affected Products 1

VendorProductVersionRange
ritlabstinyweb* <2.03

References 2

  • github.com https://github.com/maximmasiutin/TinyWeb/commit/d2edd0322c3d74beee0a6c0191299b8946695d4e
    Patch
  • github.com https://github.com/maximmasiutin/TinyWeb/security/advisories/GHSA-rp8j-cx7r-mw9f
    ExploitVendor Advisory

Remediation

  • github.com https://github.com/maximmasiutin/TinyWeb/commit/d2edd0322c3d74beee0a6c0191299b8946695d4e
    Patch