CVE-2024-4629Network attack vector

Unauthenticated password guessing via concurrent login race

Published Sep 3, 2024 · Updated Mar 26, 2026

Authentication bypass in Keycloak 24.0.3 allows remote attackers to exceed configured failed-login limits through parallel requests. The keycloak-services authentication path checks lockout status before asynchronous failure recording completes, so simultaneous attempts for one account pass the same pre-lock check. Brute Force Protection must be enabled; exploitation increases password or OTP guesses and grants account access only if a submitted credential is correct.

CVSS severity6.5
Medium
EPSS probability0.79%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Keycloak 24.0.3 allows remote attackers to exceed configured failed-login limits through parallel requests. The keycloak-services authentication path checks lockout status before asynchronous failure recording completes, so simultaneous attempts for one account pass the same pre-lock check. Brute Force Protection must be enabled; exploitation increases password or OTP guesses and grants account access only if a submitted credential is correct.

The record

CVE
CVE-2024-4629
Published
Sep 3, 2024
Updated
Mar 26, 2026
Vendor
Red Hat
Product
RHEL-8 based Middleware Containers
Classifications
CWE-837, T1110.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 3, 2024CVE publishedPublication date reported by the CVE source.
  2. Mar 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Red Hat · RHEL-8 based Middleware ContainersAffected versions are unavailable in this record.
389 Directory Server · Red Hat Single Sign-OnAffected versions are unavailable in this record.
Red Hat · Red Hat build of Keycloak 22Affected versions are unavailable in this record.
Keycloak · Keycloakversion=24.0.3

Published CVSS scores

6.5Red HatCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
6.9GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-837Improper Enforcement of a Single, Unique Action
T1110.001Password Guessing

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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