CVE-2024-1722

Keycloak-core: dos via account lockout

Published Feb 27, 2024 CVSS 3.1 · 3.7 Low EPSS < 1% KEV · Not listed
Description
A flaw was found in Keycloak. In certain conditions, this issue may allow a remote unauthenticated attacker to block other accounts from logging in.

Remediation

Vendor Workaround

Red Hat Product Security is not aware of a way to completely mitigate this issue. However, the following techniques can be used to help prevent exploitation: - Put limits on frequency of account registration, restricting how often an attacker could utilize this attack - Restrict new account registration to not allow email addresses in the username field, for example, by not allowing the "@" symbol. Note: this cannot prevent attacks against existing users who have registered with an email address. If this vulnerability has been triggered, an administrator has two options to remedy it manually by modifying the second account (of the attacker): - Delete the account - Change the username

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2024-2026 A flaw was found in Keycloak. In certain conditions, this issue may allow a remote unauthenticated attacker to block other accounts from logging in.
Github GHSA Github GHSA GHSA-cq42-vhv7-xr7p Keycloak Denial of Service via account lockout
History
Type Values Removed Values Added
First Time appeared Redhat keycloak
Weaknesses NVD-CWE-noinfo
CPEs cpe:2.3:a:redhat:keycloak:23.0.5:*:*:*:*:*:*:*
Vendors & Products Redhat keycloak
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
CPEs cpe:/a:redhat:build_keycloak:22 cpe:/a:redhat:build_keycloak:
Weaknesses

Sources

Status
PUBLISHED
Assigner
redhat
Published
Updated
Nov 21, 2025, 6:27 AM
Reserved
Feb 21, 2024, 7:39 PM
Status
Analyzed
Published
Feb 29, 2024, 1:43 AM
Modified
Jun 17, 2026, 7:04 AM
Severity
Low
Public date
Feb 21, 2024, 12:00 AM