{"schemaVersion":3,"id":"CVE-2026-27630","aliases":[],"status":"published","duplicateOf":null,"title":null,"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.","dates":{"published":"2026-02-25T23:05:16.563Z","modified":"2026-02-26T16:50:51.538Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":8.7,"severity":"high","version":"4.0","versionLabel":"v4.0","source":"CVE.org","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","computed":false,"selection":"backend-summary"},"metrics":[{"version":"4.0","versionLabel":"v4.0","source":"CVE.org","score":8.7,"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","exploitability":null,"impact":null,"computed":false},{"version":"4.0","versionLabel":"v4.0","source":"NVD","score":8.7,"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/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","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00842,"percentile":0.57217,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0.406,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.00436},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00824,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00824,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00824,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00824,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00824,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00824,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00824,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00824,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00824,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00824,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00824,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00824,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00824,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00824,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00824,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00824,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00824,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00824,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00824,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00824,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00842,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00842,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00842,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00842,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00842,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00842,"percentile":0.57217}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00436,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00824,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00824,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00824,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00824,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00824,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00824,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00824,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00824,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00824,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00824,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00824,"percentile":null},{"date":"2026-10-05T00:00:0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