CVE-2020-11996
HIGH 7.5EPSS 26.7%
A specially crafted sequence of HTTP/2 requests sent to Apache Tomcat 10.0.0-M1 to 10.0.0-M5, 9.0.0.M1 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.
- Affected
- Apache · Apache Tomcat
- CVSS v3.1 NVD
- 7.5 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS v2.0 NVD
- 5.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P - EPSS
- 26.70% chance of exploitation in the next 30 days, 98th percentile
- Published
- 2020-06-26
- Updated
- 2026-10-08
Proof-of-concept exploits (1)
- rusakovichma/tomcat-embed-core-9.0.31-CVE-2020-119965★ · 2022-01-21
Security advisories
- https://lists.apache.org/thread.html/r5541ef6b6b68b49f76fc4c45695940116da2bcbe0312ef204a0…
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00064.html
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00072.html
- https://lists.debian.org/debian-lts-announce/2020/07/msg00010.html
- https://security.netapp.com/advisory/ntap-20200709-0002
- https://usn.ubuntu.com/4596-1
- https://www.debian.org/security/2020/dsa-4727
- https://www.oracle.com/security-alerts/cpujan2021.html
- https://www.oracle.com/security-alerts/cpuoct2020.html
- advisories/GHSA-53hp-jpwq-2jgq