CVE-2026-118030

A flaw was found in the HOTP authentication mechanism of the keycloak-services component, which provides identity and access management services. The issue occurs because the system validates a one-time password and updates its internal counter in two separate steps without proper locking. An attacker with a users password could exploit this timing gap to use a single one-time code to log in multiple times simultaneously.

CVSS v3 4.2 MEDIUM

4.2^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.6 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/security/cve/CVE-2026-118030
https://bugzilla.redhat.com/show_bug.cgi?id=2562005

Configurations

No configuration.

History

29 Oct 2026, 07:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-29 07:16

Updated : 2026-10-29 15:17

NVD link : CVE-2026-118030

Mitre link : CVE-2026-118030

CVE.ORG link : CVE-2026-118030

JSON object : View

Products Affected

No product.

CWE

CWE-362

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

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