🛡️ CVE-2020-11996
🟠 CVSS 8.0 — High ✅ No Known Exploit CWE-400 OSV
8.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

A specially crafted sequence of HTTP/2 requests sent to Apache Tomcat 10.0.0 to 10.0.0, 9.0.0 to 9.0.35 and 8.5.0 to 8.5.55 could trigger high CPU usage for several seconds. If a sufficient number of such requests were made on concurrent HTTP/2 connections, the server could become unresponsive.

Details

Severity HIGH
CVSS Score 8.0
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE CWE-400
Public Exploit ✅ No
Source OSV
Published 2022-02-09
Updated 2026-06-15
Modified 2026-06-11
Fix URL N/A

Affected Packages

Software From version Fixed in
org.apache.tomcat:tomcat 8.5.0 8.5.55
org.apache.tomcat.embed:tomcat-embed-core 8.5.0 8.5.55
tomcat

References

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