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.
Fix
Patch, vendor advisory and mitigation references on NVD 4
- https://access.redhat.com/errata/RHSA-2026:19596 Vendor Advisory
- https://access.redhat.com/errata/RHSA-2026:19597 Vendor Advisory
- https://access.redhat.com/security/cve/CVE-2026-37982 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2455329 Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 6.8 · redhatNVD modified 2026-10-26 13:10
Affected (CPE criteria) 1
cpe:2.3:a:redhat:build_of_keycloak:*:*:*:*:*:*:*:*
References 4
- https://access.redhat.com/errata/RHSA-2026:19596 Vendor Advisory
- https://access.redhat.com/errata/RHSA-2026:19597 Vendor Advisory
- https://access.redhat.com/security/cve/CVE-2026-37982 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2455329 Vendor Advisory