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CVE-2026-27630

· Published 26/02/2026 00:16 · Modified 27/02/2026 14:06

Labels: CVE-2026-27630 2026-02-26CVE-2026-27630CWE-400[email protected]

Essential information

Published
26/02/2026 00:16
Modified
27/02/2026 14:06
Author
Creator
CVSS
8.7 HIGH (v3) 8.7 HIGH (v4.0)
CISA KEV
No
CWE
CVSS vector

CVSS metrics

Description

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.

NVD status

Status
Undergoing Analysis — CVE has been recently published to the CVE List and has been received by the NVD.
Source
[email protected]
NVD
View on NVD

Affected products (CPE)

ProductCPE
tinyweb / tinyweb cpe:2.3:a:tinyweb:tinyweb:*:<2.02>*:*:*:*:*:*

References