CVE-2021-28165: 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 inva
Noroxi assessment
Priority: Plan (action score 46/100)
- Public proof-of-concept code exists (GitHub); there is no record of exploitation in the wild.
- Probability of exploitation in the next 30 days: 53.8% (FIRST EPSS); higher than 99% of all records.
- Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
- According to CISA the attack is automatable: targets can be found by mass scanning.
- Fixed version: jetty9 (Debian:10) 9.4.16-0+deb10u1; jetty9 (Debian:12) 9.4.39-1; org.eclipse.jetty:jetty-server (Maven) 10.0.2, 11.0.2, 9.4.39.
- Mentioned 4 times in Turkish national cyber security advisories (siberguvenlik.gov.tr).
Add it to your regular patch cycle. Upgrade to jetty9 (Debian:10) 9.4.16-0+deb10u1; jetty9 (Debian:12) 9.4.39-1; org.eclipse.jetty:jetty-server (Maven) 10.0.2, 11.0.2, 9.4.39 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
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.
- Published
- Apr 1, 2021
- Updated
- Jun 16, 2026
- EPSS
- 53.8% · 99th percentile
- CWE
- CWE-400
Report tools
Action score
46
Plan
Add it to your regular patch cycle.
- CVSS
- 30 / 40 · 7.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 16 / 30 · 53.8%
CISA SSVC decision
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- 7.5
- CNA · eclipse
- 7.5
- agree
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- Proof of concept exists, no weaponized module
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
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Noroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| eclipse | jetty | cpe:2.3:a:eclipse:jetty |
| oracle | autovue for agile product lifecycle management | cpe:2.3:a:oracle:autovue_for_agile_product_lifecycle_management |
| oracle | communications cloud native core policy | cpe:2.3:a:oracle:communications_cloud_native_core_policy |
| oracle | communications element manager | cpe:2.3:a:oracle:communications_element_manager |
| oracle | communications services gatekeeper | cpe:2.3:a:oracle:communications_services_gatekeeper |
| oracle | communications session report manager | cpe:2.3:a:oracle:communications_session_report_manager |
| oracle | communications session route manager | cpe:2.3:a:oracle:communications_session_route_manager |
| oracle | rest data services | cpe:2.3:a:oracle:rest_data_services |
| oracle | siebel core - automation | cpe:2.3:a:oracle:siebel_core_-_automation |
| jenkins | jenkins | cpe:2.3:a:jenkins:jenkins |
| netapp | cloud manager | cpe:2.3:a:netapp:cloud_manager |
| netapp | e-series performance analyzer | cpe:2.3:a:netapp:e-series_performance_analyzer |
and 9 more
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- eclipse jetty7.2.2 and later · before 9.4.39
- eclipse jetty10.0.0 and later · before 10.0.2
- eclipse jetty11.0.0 and later · before 11.0.2
- jenkins jenkinsbefore 2.286
- jenkins jenkinsbefore 2.277.3
- netapp cloud managerbefore 3.9.8
- netapp e-series performance analyzerbefore 3.0
- netapp e-series santricity os controller11.0.0 and later · before 11.70.1
- netapp e-series santricity storagebefore 1.10
- netapp e-series santricity web servicesbefore 5.1
- netapp ontap toolsbefore 9.10
- netapp santricity cloud connectorall versions
- netapp santricity web services proxybefore 5.1
- netapp snapcenterbefore 4.6
- netapp storage replication adapter for clustered data ontapbefore 9.10
- netapp vasa provider for clustered data ontapbefore 9.10
- oracle autovue for agile product lifecycle management21.0.2
- oracle communications cloud native core policy1.14.0
- oracle communications element manager8.2.2
- oracle communications services gatekeeper7.0
Versions reported by the vendor
Affected version ranges reported by the assigning authority (eclipse). Independent of NVD's CPE analysis and usually ahead of it.
The Eclipse Foundation Eclipse Jetty
- 7.2.2 and later · before unspecifiedaffected
- unspecified and later · up to and including 9.4.38affected
- 10.0.0.alpha0 and later · before unspecifiedaffected
- unspecified and later · up to and including 10.0.1affected
- 11.0.0.alpha0 and later · before unspecifiedaffected
- unspecified and later · up to and including 11.0.1affected
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:10 | jetty9 | before 9.4.16-0+deb10u1 | 9.4.16-0+deb10u1 |
| Debian:12 | jetty9 | before 9.4.39-1 | 9.4.39-1 |
| Maven | org.eclipse.jetty:jetty-server | from 10.0.0 · before 10.0.2 | 10.0.2 |
| Maven | org.eclipse.jetty:jetty-server | from 11.0.0 · before 11.0.2 | 11.0.2 |
| Maven | org.eclipse.jetty:jetty-server | from 7.2.2 · before 9.4.39 | 9.4.39 |
| openSUSE:Leap 15.3 | jetty-minimal | before 9.4.42-3.9.1 | 9.4.42-3.9.1 |
| openSUSE:Leap 15.3 | jetty-websocket | before 9.4.42-3.9.1 | 9.4.42-3.9.1 |
| Red Hat:devtools:2021 | rh-eclipse-jetty | before 0:9.4.40-1.1.el7_9 | 0:9.4.40-1.1.el7_9 |
| Red Hat:devtools:2021 | rh-eclipse-jetty-client | before 0:9.4.40-1.1.el7_9 | 0:9.4.40-1.1.el7_9 |
| Red Hat:devtools:2021 | rh-eclipse-jetty-continuation | before 0:9.4.40-1.1.el7_9 | 0:9.4.40-1.1.el7_9 |
| Red Hat:devtools:2021 | rh-eclipse-jetty-http | before 0:9.4.40-1.1.el7_9 | 0:9.4.40-1.1.el7_9 |
| Red Hat:devtools:2021 | rh-eclipse-jetty-io | before 0:9.4.40-1.1.el7_9 | 0:9.4.40-1.1.el7_9 |
| Red Hat:devtools:2021 | rh-eclipse-jetty-jaas | before 0:9.4.40-1.1.el7_9 | 0:9.4.40-1.1.el7_9 |
| Red Hat:devtools:2021 | rh-eclipse-jetty-javadoc | before 0:9.4.40-1.1.el7_9 | 0:9.4.40-1.1.el7_9 |
| Red Hat:devtools:2021 | rh-eclipse-jetty-jmx | before 0:9.4.40-1.1.el7_9 | 0:9.4.40-1.1.el7_9 |
| Red Hat:devtools:2021 | rh-eclipse-jetty-security | before 0:9.4.40-1.1.el7_9 | 0:9.4.40-1.1.el7_9 |
| Red Hat:devtools:2021 | rh-eclipse-jetty-server | before 0:9.4.40-1.1.el7_9 | 0:9.4.40-1.1.el7_9 |
| Red Hat:devtools:2021 | rh-eclipse-jetty-servlet | before 0:9.4.40-1.1.el7_9 | 0:9.4.40-1.1.el7_9 |
| Red Hat:devtools:2021 | rh-eclipse-jetty-util | before 0:9.4.40-1.1.el7_9 | 0:9.4.40-1.1.el7_9 |
| Red Hat:devtools:2021 | rh-eclipse-jetty-util-ajax | before 0:9.4.40-1.1.el7_9 | 0:9.4.40-1.1.el7_9 |
| Red Hat:devtools:2021 | rh-eclipse-jetty-webapp | before 0:9.4.40-1.1.el7_9 | 0:9.4.40-1.1.el7_9 |
| Red Hat:devtools:2021 | rh-eclipse-jetty-xml | before 0:9.4.40-1.1.el7_9 | 0:9.4.40-1.1.el7_9 |
| Red Hat:openshift:4.7::el7 | cri-tools | before 0:1.20.0-2.el7 | 0:1.20.0-2.el7 |
| Red Hat:openshift:4.7::el7 | cri-tools-debuginfo | before 0:1.20.0-2.el7 | 0:1.20.0-2.el7 |
+10
Same product
eclipse: all recordsOther highest-scoring records for the same primary product.
- CVE-2021-34429For Eclipse Jetty versions 9.4.37-9.4.42, 10.0.1-10.0.5 & 11.0.1-11.0.5, URIs can be crafted using some encoded characters to access the con60This week
- CVE-2021-28164In Eclipse Jetty 9.4.37.v20210219 to 9.4.38.v20210224, the default compliance mode allows requests with URIs that contain %2e or %2e%2e segm60This week
- CVE-2015-2080The exception handling code in Eclipse Jetty before 9.2.9.v20150224 allows remote attackers to obtain sensitive information from process mem53Plan
Published before and after this one in the same product
- ← EarlierCVE-2020-27223Feb 26, 2021 · In Eclipse Jetty 9.4.6.v20170531 to 9.4.36.v20210114 (inclusive), 10.0.0, and 11.0.0 when Jetty handles a request containing multiple Accept44Plan
- ← EarlierCVE-2021-28163Apr 1, 2021 · In Eclipse Jetty 9.4.32 to 9.4.38, 10.0.0.beta2 to 10.0.1, and 11.0.0.beta2 to 11.0.1, if a user uses a webapps directory that is a symlink,11Monitor
- Later →CVE-2021-28169Jun 8, 2021 · For Eclipse Jetty versions <= 9.4.40, <= 10.0.2, <= 11.0.2, it is possible for requests to the ConcatServlet with a doubly encoded path to a45Plan
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:jetty9 | 9.4.39-1 · Debian:12 | Package registry (OSV) |
| Maven:org.eclipse.jetty:jetty-server | 10.0.2 | Package registry (OSV) |
| Maven:org.eclipse.jetty:jetty-server | 11.0.2 | Package registry (OSV) |
| Maven:org.eclipse.jetty:jetty-server | 9.4.39 | Package registry (OSV) |
| opensuse:jetty-minimal | 9.4.42-3.9.1 · openSUSE:Leap 15.3 | Package registry (OSV) |
| opensuse:jetty-websocket | 9.4.42-3.9.1 · openSUSE:Leap 15.3 | Package registry (OSV) |
| red hat:rh-eclipse-jetty | 0:9.4.40-1.1.el7_9 · Red Hat:devtools:2021 | Package registry (OSV) |
| red hat:rh-eclipse-jetty-client | 0:9.4.40-1.1.el7_9 · Red Hat:devtools:2021 | Package registry (OSV) |
| red hat:rh-eclipse-jetty-continuation | 0:9.4.40-1.1.el7_9 · Red Hat:devtools:2021 | Package registry (OSV) |
| red hat:rh-eclipse-jetty-http | 0:9.4.40-1.1.el7_9 · Red Hat:devtools:2021 | Package registry (OSV) |
| red hat:rh-eclipse-jetty-io | 0:9.4.40-1.1.el7_9 · Red Hat:devtools:2021 | Package registry (OSV) |
| red hat:rh-eclipse-jetty-jaas | 0:9.4.40-1.1.el7_9 · Red Hat:devtools:2021 | Package registry (OSV) |
| red hat:rh-eclipse-jetty-javadoc | 0:9.4.40-1.1.el7_9 · Red Hat:devtools:2021 | Package registry (OSV) |
| red hat:rh-eclipse-jetty-jmx | 0:9.4.40-1.1.el7_9 · Red Hat:devtools:2021 | Package registry (OSV) |
| red hat:rh-eclipse-jetty-security | 0:9.4.40-1.1.el7_9 · Red Hat:devtools:2021 | Package registry (OSV) |
| red hat:rh-eclipse-jetty-server | 0:9.4.40-1.1.el7_9 · Red Hat:devtools:2021 | Package registry (OSV) |
| red hat:rh-eclipse-jetty-servlet | 0:9.4.40-1.1.el7_9 · Red Hat:devtools:2021 | Package registry (OSV) |
| red hat:rh-eclipse-jetty-util | 0:9.4.40-1.1.el7_9 · Red Hat:devtools:2021 | Package registry (OSV) |
| suse:jetty-minimal | 9.4.42-3.9.1 · SUSE:Linux Enterprise Module for Development Tools 15 SP2 | Package registry (OSV) |
Exploit status
Proof of concept available
A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.
Evidence
- Proof-of-concept repository on GitHub ×1
Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.
| Source | Kind | Date |
|---|---|---|
| Proof-of-concept repository on GitHub | stars:0 | 2023-11-02 |
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
- Published
- First PoC+945 d
- TodayNov 9, 2026+2048 d
No history yet (it accumulates with the daily EPSS job).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
National notice (Türkiye Cybersecurity Directorate / USOM)
Official security notices citing this record; remediation advice is on the agency's page.
- TR-21-0921 · Nov 16, 2021(IBM Güvenlik Bülteni Yayınladı)
- TR-21-0533 · Jun 30, 2021(IBM Güvenlik Bülteni Yayınladı)
- TR-21-0484 · Jun 16, 2021(IBM Güvenlik Bülteni Yayınladı)
- TR-21-0466 · Jun 10, 2021(IBM Güvenlik Bülteni Yayınladı)
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-400 · Uncontrolled Resource ConsumptionCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvd-primary
Root cause
Code that parses nested structures sets no depth or size limit. A small input can turn into a disproportionate processing load.
The bug in code
The whole CWE-400 classA representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.
Vulnerable
function expand(node) {
return node.children.map(expand);
}Fixed
const MAX_DEPTH = 32;
function expand(node, depth = 0) {
if (depth > MAX_DEPTH) throw new Error("too deep");
return node.children.map((c) => expand(c, depth + 1));
}Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (19 more)Show less
- lists.apache.org/thread.html/r002258611ed0c35b82b839d284b43db9dcdec120db8afc1c993137dc%40%3Cnotifications.zookeeper.apache.org%3E
- lists.apache.org/thread.html/r03ca0b69db1e3e5f72fe484b71370d537cd711cbf334e2913332730a%40%3Cissues.spark.apache.org%3E
- lists.apache.org/thread.html/r05db8e0ef01e1280cc7543575ae0fa1c2b4d06a8b928916ef65dd2ad%40%3Creviews.spark.apache.org%3E
- lists.apache.org/thread.html/r06d54a297cb8217c66e5190912a955fb870ba47da164002bf2baffe5%40%3Creviews.spark.apache.org%3E
- lists.apache.org/thread.html/r077b76cafb61520c14c87c4fc76419ed664002da0ddac5ad851ae7e7%40%3Cjira.kafka.apache.org%3E
- lists.apache.org/thread.html/r0841b06b48324cfc81325de3c05a92e53f997185f9d71ff47734d961%40%3Cissues.solr.apache.org%3E
- lists.apache.org/thread.html/r0a241b0649beef90d422b42a26a2470d336e59e66970eafd54f9c3e2%40%3Ccommits.zookeeper.apache.org%3E
- lists.apache.org/thread.html/r0a4797ba6ceea8074f47574a4f3cc11493d514c1fab8203ebd212add%40%3Creviews.spark.apache.org%3E
- lists.apache.org/thread.html/r0bf3aa065abd23960fc8bdc8090d6bc00d5e391cf94ec4e1f4537ae3%40%3Cjira.kafka.apache.org%3E
- lists.apache.org/thread.html/r0cd1a5e3f4ad4770b44f8aa96572fc09d5b35bec149c0cc247579c42%40%3Creviews.spark.apache.org%3E
- lists.apache.org/thread.html/r0f02034a33076fd7243cf3a8807d2766e373f5cb2e7fd0c9a78f97c4%40%3Cissues.hbase.apache.org%3E
- lists.apache.org/thread.html/r111f1ce28b133a8090ca4f809a1bdf18a777426fc058dc3a16c39c66%40%3Cissues.solr.apache.org%3E
- lists.apache.org/thread.html/r17e26cf9a1e3cbc09522d15ece5d7c7a00cdced7641b92a22a783287%40%3Cissues.zookeeper.apache.org%3E
- lists.apache.org/thread.html/r23785214d47673b811ef119ca3a40f729801865ea1e891572d15faa6%40%3Creviews.spark.apache.org%3E
- lists.apache.org/thread.html/r2afc72af069a7fe89ca2de847f3ab3971cb1d668a9497c999946cd78%40%3Ccommits.spark.apache.org%3E
- lists.apache.org/thread.html/r2ea2f0541121f17e470a0184843720046c59d4bde6d42bf5ca6fad81%40%3Cissues.solr.apache.org%3E
- lists.apache.org/thread.html/r2f2d9c3b7cc750a6763d6388bcf5db0c7b467bd8be6ac4d6aea4f0cf%40%3Creviews.spark.apache.org%3E
- lists.apache.org/thread.html/r31f591a0deac927ede8ccc3eac4bb92697ee2361bf01549f9e3440ca%40%3Creviews.spark.apache.org%3E
- lists.apache.org/thread.html/r33eb3889ca0aa12720355e64fc2f8f1e8c0c28a4d55b3b4b8891becb%40%3Ccommits.zookeeper.apache.org%3E
Vendor advisories and official records. Exploit/PoC links are deliberately left out.