CVE-2026-28497: critical vulnerability in maximmasiutin TinyWeb
TinyWeb: Integer Overflow in `_Val` (HTTP Request Smuggling)
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.3epss 0.5%
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:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Affected products
maximmasiutin · TinyWebRelated CVEs — maximmasiutin TinyWeb
In the same product, most dangerous first.
CVE-2026-22781CRITICALTinyWeb CGI Command InjectionEPSS 2.4%CVE-2026-27613CRITICALCGI Parameter Injection (Bypass of STRICT_CGI_PARAMS and EscapeShellParam)EPSS 0.9%CVE-2026-27633HIGHTinyWeb has Unbounded Content-Length Memory Exhaustion (DoS)EPSS 0.5%CVE-2026-27630HIGHTinyWeb vulnerable to Remote Denial of Service via Thread/Connection Exhaustion (Slowloris)EPSS 0.5%CVE-2026-29046CRITICALTinyWeb: HTTP Header Control Character Injection into CGI EnvironmentEPSS 0.4%