CVE-2026-37982
MEDIUMKeycloak: org.keycloak.authentication: keycloak: unauthorized account takeover via webauthn token replay
Title source: cnaDescription
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.
References (4)
Core 4
Core References
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:19596
https://access.redhat.com/errata/RHSA-2026:19596
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:19597
https://access.redhat.com/errata/RHSA-2026:19597
Vdb Entry, X_Refsource_Redhat vdb-entry
x_refsource_redhat
https://access.redhat.com/security/cve/CVE-2026-37982
Issue Tracking, X_Refsource_Redhat issue-tracking
x_refsource_redhat
RHBZ#2455329
https://bugzilla.redhat.com/show_bug.cgi?id=2455329
Scores
CVSS v3
6.8
EPSS
0.0002
EPSS Percentile
3.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-294
Status
published
Products (4)
Red Hat/Red Hat Build of Keycloak
Red Hat/Red Hat build of Keycloak 26.4
26.4-17
Red Hat/Red Hat build of Keycloak 26.4
26.4.12-1
Red Hat/Red Hat build of Keycloak 26.4.12
Published
May 19, 2026
Tracked Since
May 19, 2026