CVE-2026-27630: fallo de gravedad alta en maximmasiutin TinyWeb
TinyWeb vulnerable to Remote Denial of Service via Thread/Connection Exhaustion (Slowloris)
Publicada el · Actualizada el
Aviso por correo cuando entre en el KEV, tenga PoC pública o suba de nota.
21Vexday Risk Score
Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.
ssvc Trackcvss 8.7epss 0.5%
TinyWeb is a web server (HTTP, HTTPS) written in Delphi for Win32. Versions prior to version 2.02 are vulnerable to a Denial of Service (DoS) attack known as Slowloris. The server spawns a new OS thread for every incoming connection without enforcing a maximum concurrency limit or an appropriate request timeout. An unauthenticated remote attacker can exhaust server concurrency limits and memory by opening numerous connections and sending data exceptionally slowly (e.g. 1 byte every few minutes). Anyone hosting services using TinyWeb is impacted. Version 2.02 fixes the issue. The patch introduces a `CMaxConnections` limit (set to 512) and a `CConnectionTimeoutSecs` idle timeout (set to 30 seconds). As a temporary workaround if upgrading is not immediately possible, consider placing the server behind a robust reverse proxy or Web Application Firewall (WAF) such as nginx, HAProxy, or Cloudflare, configured to buffer incomplete requests and aggressively enforce connection limits and timeouts.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Productos afectados
maximmasiutin · TinyWebCVEs relacionadas — maximmasiutin TinyWeb
En el mismo producto, de las más peligrosas a las menos.
CVE-2026-22781CRITICALTinyWeb CGI Command InjectionEPSS 2.4%CVE-2026-27613CRITICALCGI Parameter Injection (Bypass of STRICT_CGI_PARAMS and EscapeShellParam)EPSS 0.9%CVE-2026-28497CRITICALTinyWeb: Integer Overflow in `_Val` (HTTP Request Smuggling)EPSS 0.5%CVE-2026-27633HIGHTinyWeb has Unbounded Content-Length Memory Exhaustion (DoS)EPSS 0.5%CVE-2026-29046CRITICALTinyWeb: HTTP Header Control Character Injection into CGI EnvironmentEPSS 0.4%