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CVE Vulnerability Details :
CVE-2026-27630
PUBLISHED
More InfoOfficial Page
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
View Known Exploited Vulnerability (KEV) details
Published At-25 Feb, 2026 | 23:05
Updated At-26 Feb, 2026 | 16:50
Rejected At-
▼CVE Numbering Authority (CNA)
TinyWeb vulnerable to Remote Denial of Service via Thread/Connection Exhaustion (Slowloris)

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.

Affected Products
Vendor
maximmasiutin
Product
TinyWeb
Versions
Affected
  • < 2.02
Problem Types
TypeCWE IDDescription
CWECWE-400CWE-400: Uncontrolled Resource Consumption
Type: CWE
CWE ID: CWE-400
Description: CWE-400: Uncontrolled Resource Consumption
Metrics
VersionBase scoreBase severityVector
4.08.7HIGH
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
Version: 4.0
Base score: 8.7
Base severity: HIGH
Vector:
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
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://github.com/maximmasiutin/TinyWeb/security/advisories/GHSA-ccv5-8948-c99c
x_refsource_CONFIRM
https://github.com/maximmasiutin/TinyWeb/commit/23268c8
x_refsource_MISC
https://www.masiutin.net/tinyweb-cve-2026-27630.html
x_refsource_MISC
Hyperlink: https://github.com/maximmasiutin/TinyWeb/security/advisories/GHSA-ccv5-8948-c99c
Resource:
x_refsource_CONFIRM
Hyperlink: https://github.com/maximmasiutin/TinyWeb/commit/23268c8
Resource:
x_refsource_MISC
Hyperlink: https://www.masiutin.net/tinyweb-cve-2026-27630.html
Resource:
x_refsource_MISC
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
Details not found