Skip to content
Fencer Vulns
high 7.5

CVE-2021-30468 json

Apache CXF Denial of service vulnerability in parsing JSON via JsonMapObjectReaderWriter

published 2021-06-16 5 y ago modified 2026-06-17 4 mo ago also GHSA-g23v-p5jq-jvh4 , EUVD-2022-0592

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
7.0%
EPSS 7.0% chance of exploitation in 30 days, percentile 94%
public exploits
0
none known

Summary

A vulnerability in the JsonMapObjectReaderWriter of Apache CXF allows an attacker to submit malformed JSON to a web service, which results in the thread getting stuck in an infinite loop, consuming CPU indefinitely. This issue affects Apache CXF versions prior to 3.4.4; Apache CXF versions prior to 3.3.11.

Patch / fix

  • maven org.apache.cxf:apache-cxf 3.3.11, 3.4.4
  • maven org.apache.cxf:cxf 3.3.11, 3.4.4
  • Apache Software Foundation Apache CXF 3.3.11, 3.4.4

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2021-30468 updated cvss 7.5

CXF: Denial of service vulnerability in parsing JSON via JsonMapObjectReaderWriter

  • Red Hat Integration Camel Quarkus 1 cxf-rt-rs-json-basic
    affected: no fix available
  • Red Hat JBoss Fuse 6 cxf-rt-rs-json-basic Red Hat OpenShift Container Platform 4 openshift4/ose-logging-elasticsearch6
    affected: no fix planned “Out of support scope”
  • Red Hat JWS 5.7.0
    fixed: vendor fix RHSA-2022:7273
  • Red Hat Fuse 7.10
    fixed: vendor fix RHSA-2021:5134
  • Red Hat Integration
    fixed: vendor fix RHSA-2021:3205
  • Red Hat Logging Subsystem for Red Hat OpenShift openshift-logging/elasticsearch6-rhel8 Red Hat BPM Suite 6 cxf-rt-rs-json-basic Red Hat Decision Manager 7 cxf-rt-rs-json-basic Red Hat JBoss Data Virtualization 6 cxf-rt-rs-json-basic Red Hat JBoss Enterprise Application Platform 6 cxf-rt-rs-json-basic Red Hat JBoss Enterprise Application Platform 7 cxf-rt-rs-json-basic
    +6 more products
    Red Hat JBoss Enterprise Application Platform Expansion Pack cxf-rt-rs-json-basic Red Hat JBoss Fuse Service Works 6 cxf-rt-rs-json-basic Red Hat JBoss Operations Network 3 cxf-rt-rs-json-basic Red Hat JBoss SOA Platform 5 cxf-rt-rs-json-basic Red Hat Process Automation 7 cxf-rt-rs-json-basic Red Hat Single Sign-On 7 cxf-rt-rs-json-basic
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

7.02% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
maven org.apache.cxf:apache-cxf
>=3.4.0, <3.4.4
<3.3.11
3.4.4
3.3.11
maven org.apache.cxf:cxf
>=3.4.0, <3.4.4
<3.3.11
3.4.4
3.3.11

Affected products

  • Apache Software Foundation Apache CXF

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption
  • CWE-835 Loop with Unreachable Exit Condition

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.