CVE-2021-28165
HighJetty vulnerable to incorrect handling of invalid large TLS frame, exhausting CPU resources
Published Apr 6, 2021 · Updated Sep 8, 2026 · Also known as BIT-jenkins-2021-28165, DEBIAN-CVE-2021-28165, GHSA-26vr-8j45-3r4w, UBUNTU-CVE-2021-28165
Key Facts
Patch immediately- CVE-2021-28165 is a high-severity vulnerability (CVSS 7.5 v3.1) affecting Jetty (Eclipse), Jenkins, Cloud Manager (Netapp) and 22 more products.
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 54% probability of exploitation in the next 30 days.
- Fixed versions are available, including Jetty 9.4.39, Jetty unspecified, Jenkins 0:2.277.3.1620393611-1.el8.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS (30-day exploit likelihood)
54%
Higher than 98.9% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
None known
Get the full CVE-2021-28165 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
In Eclipse Jetty 7.2.2 to 9.4.38, 10.0.0.alpha0 to 10.0.1, and 11.0.0.alpha0 to 11.0.1, CPU usage can reach 100% upon receiving a large invalid TLS frame.
Affected Products
155 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| JettyEclipse | >= 7.2.2 | 9.4.39 |
| JenkinsJenkins | See advisory | 2.286 |
| Cloud ManagerNetapp | See advisory | 3.9.8 |
| E-Series Performance AnalyzerNetapp | See advisory | 3.0 |
| E-Series Santricity OS ControllerNetapp | See advisory | 11.70.1 |
Patched Releases
Jetty
9.4.39, unspecified
Jenkins
0:2.277.3.1620393611-1.el8, 2.286.0, 2.277.3, 2.286
jetty-annotations
9.0.3-8.amzn2.0.6, 9.4.42-3.9.1, 9.4.43-1.2
jetty-ant
9.0.3-8.amzn2.0.6, 9.4.43-1.2
jetty-cdi
9.4.43-1.2
jetty-client
9.0.3-8.amzn2.0.6, 9.4.42-3.9.1, 9.4.43-1.2
jetty-continuation
9.0.3-8.amzn2.0.6, 9.4.42-3.9.1, 9.4.43-1.2
jetty-deploy
9.0.3-8.amzn2.0.6, 9.4.43-1.2
jetty-fcgi
9.4.43-1.2
jetty-http
9.0.3-8.amzn2.0.6, 9.4.42-3.9.1, 9.4.43-1.2
jetty-http-spi
9.4.43-1.2
jetty-io
9.0.3-8.amzn2.0.6, 9.4.42-3.9.1, 9.4.43-1.2
jetty-jaas
9.0.3-8.amzn2.0.6, 9.4.42-3.9.1, 9.4.43-1.2
jetty-jaspi
9.0.3-8.amzn2.0.6
jetty-javadoc
9.0.3-8.amzn2.0.6
jetty-javax-websocket-client-impl
9.4.42-3.9.1
jetty-javax-websocket-server-impl
9.4.42-3.9.1
jetty-jmx
9.0.3-8.amzn2.0.6, 9.4.42-3.9.1, 9.4.43-1.2
jetty-jndi
9.0.3-8.amzn2.0.6, 9.4.42-3.9.1, 9.4.43-1.2
jetty-jsp
9.0.3-8.amzn2.0.6, 9.4.42-3.9.1, 9.4.43-1.2
jetty-jspc-maven-plugin
9.0.3-8.amzn2.0.6
jetty-maven-plugin
9.0.3-8.amzn2.0.6
jetty-minimal
9.4.42-3.9.1
jetty-minimal-javadoc
9.4.42-3.9.1, 9.4.43-1.2
jetty-monitor
9.0.3-8.amzn2.0.6
Timeline
Publicly disclosed
Apr 6, 2021
Last updated
Sep 8, 2026
Weakness Type
- CWE-400 Uncontrolled Resource Consumption
- CWE-551 Incorrect Behavior Order: Authorization Before Parsing and Canonicalization
- CWE-755 Improper Handling of Exceptional Conditions
References
- advisoryhttp://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-1968
- advisoryhttp://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-27221
- advisoryhttp://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-28163
- advisoryhttp://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-28164
- advisoryhttp://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-28165
FAQ
Common Questions.
In Eclipse Jetty 7.2.2 to 9.4.38, 10.0.0.alpha0 to 10.0.1, and 11.0.0.alpha0 to 11.0.1, CPU usage can reach 100% upon receiving a large invalid TLS frame.
Affected: Jetty (Eclipse) versions >= 7.2.2; Jenkins; Cloud Manager (Netapp), among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including Jetty 9.4.39, Jetty unspecified, Jenkins 0:2.277.3.1620393611-1.el8.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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