A flaw was found in Keycloak. This authentication vulnerability allows a remote attacker to replay `ExecuteActionsActionToken` tokens within Keycloak's WebAuthn (Web Authentication) flow. By intercepting an execute-actions email link, an attacker can register their own authenticator to a victim's account. This leads to unauthorized enrollment of a hardware-backed credential, enabling persistent account takeover.
History

Tue, 19 May 2026 16:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-1025
CWE-602

Tue, 19 May 2026 14:30:00 +0000

Type Values Removed Values Added
First Time appeared Redhat build Of Keycloak
Vendors & Products Redhat build Of Keycloak

Tue, 19 May 2026 14:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-294
Metrics ssvc

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


Tue, 19 May 2026 12:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-1025
CWE-602

Tue, 19 May 2026 12:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Moderate


Tue, 19 May 2026 11:30:00 +0000

Type Values Removed Values Added
Description A flaw was found in Keycloak. This authentication vulnerability allows a remote attacker to replay `ExecuteActionsActionToken` tokens within Keycloak's WebAuthn (Web Authentication) flow. By intercepting an execute-actions email link, an attacker can register their own authenticator to a victim's account. This leads to unauthorized enrollment of a hardware-backed credential, enabling persistent account takeover.
Title Keycloak: org.keycloak.authentication: keycloak: unauthorized account takeover via webauthn token replay
First Time appeared Redhat
Redhat build Keycloak
CPEs cpe:/a:redhat:build_keycloak:
Vendors & Products Redhat
Redhat build Keycloak
References
Metrics cvssV3_1

{'score': 6.8, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-05-19T13:38:00.236Z

Reserved: 2026-04-06T07:48:39.722Z

Link: CVE-2026-37982

cve-icon Vulnrichment

Updated: 2026-05-19T13:37:11.234Z

cve-icon NVD

Status : Undergoing Analysis

Published: 2026-05-19T12:16:18.610

Modified: 2026-05-19T15:16:30.613

Link: CVE-2026-37982

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-05-19T00:00:00Z

Links: CVE-2026-37982 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-05-19T17:30:10Z