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CVE-2023-6841

21
FAUCET Score

CVE-2023-6841 is a denial-of-service vulnerability affecting Red Hat Keycloak and Single Sign-On, where an attacker can exhaust system resources by sending repeated HTTP requests with long attribute values due to a lack of attribute limits per object. This vulnerability carries a CVSS score of 7.5 (HIGH), indicating a network-based attack with low complexity and a high impact on availability. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:redhat:keycloak:-:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:a:redhat:single_sign-on:7.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.74%
Probability of exploitation in next 30 days
EPSS Percentile
50.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0074 is in the 26th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

mavenpatch availablevia ghsa
Product: org.keycloak:keycloak-coreFixed in: 24.0.0
redhatvendor investigatingvia nvd_reference
View patch
redhatvendor investigatingvia redhat_api
Product: Red Hat Single Sign-On 7Fixed in: rh-sso7-keycloak

Vendor Advisories (2)

mavenGHSA-w97f-w3hq-36g2high

Keycloak Denial of Service vulnerability

Sep 10, 2024
redhatCVE-2023-6841Moderate

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

Sep 10, 2024

References

access.redhat.com / security/cve/CVE-2023-6841
Vendor Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingVendor Advisory