Skip to content
Fencer Vulns
high 7.5

CVE-2023-6841 json

Keycloak: amount of attributes per object is not limited and it may lead to dos

published 2024-09-10 2 y ago modified 2026-11-05 3 d ago also GHSA-w97f-w3hq-36g2 , EUVD-2024-2886

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 54%
public exploits
0
none known

Summary

A denial of service vulnerability was found in keycloak where the amount of attributes per object is not limited,an attacker by sending repeated HTTP requests could cause a resource exhaustion when the application send back rows with long attribute values.

Patch / fix

  • maven org.keycloak:keycloak-core 24.0.0

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-2023-6841 updated cvss 7.5

keycloak: Amount of attributes per object is not limited and it may lead to DOS

  • Red Hat Single Sign-On 7 rh-sso7-keycloak rh-sso7-keycloak
    affected: workaround, no fix available “This CVE is mitigated by the 'User Profile' functionality, which was introduced in Keycloak 24. This feature introduces additional validation which prevents this vulnerability from being exploited.”
  • Red Hat build of Quarkus keycloak keycloak Red Hat Fuse 7 keycloak keycloak Red Hat Mobile Application Platform 4 keycloak Red Hat OpenShift Application Runtimes keycloak keycloak Red Hat Process Automation 7 keycloak keycloak Red Hat support for Spring Boot keycloak keycloak
    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

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.74% chance of exploitation in the next 30 days, higher than 54% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
GitHub 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
maven org.keycloak:keycloak-core
<24.0.0
24.0.0

Affected products

  • Red Hat Red Hat build of Quarkus
  • Red Hat Red Hat Fuse 7
  • Red Hat Red Hat Mobile Application Platform 4
  • Red Hat Red Hat OpenShift Application Runtimes
  • Red Hat Red Hat Process Automation 7
  • Red Hat Red Hat Single Sign-On 7
  • Red Hat Red Hat support for Spring Boot

Classification

Weakness
  • CWE-231 Improper Handling of Extra Values
Technology feeds

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.