GitHub Advisoryadvisory · Maven
GHSA-w4p5-rfh6-cwrv Keycloak: Unauthorized account takeover via WebAuthn token replay
MEDIUM
Official page ↗
- Aliases
- CVE-2026-37982
- Ecosystem
- Maven
- Packages
- org.keycloak:keycloak-services
- Severity
- Moderate
- CVSS vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
- Weaknesses
- CWE-294
- Reviewed
- 2026-06-04
Affected packages
• Maven org.keycloak:keycloak-services: < 26.6.2 → fixed in 26.6.2
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.
Related
Alias · CVE (1)
- CVE-2026-37982 A flaw was found in Keycloak. vulnerability
Weakness · CWE (1)
- CWE-294 Authentication Bypass by Capture-replay weakness
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-37982 advisory
- https://github.com/keycloak/keycloak/pull/49126 web
- https://github.com/keycloak/keycloak/commit/2d1a24f501454a44c52daa62855419b31dc499c1 web
- https://access.redhat.com/errata/RHSA-2026:19596 web
- https://access.redhat.com/errata/RHSA-2026:19597 web
- https://access.redhat.com/security/cve/CVE-2026-37982 web
- https://bugzilla.redhat.com/show_bug.cgi?id=2455329 web
- https://github.com/keycloak/keycloak package
- https://github.com/keycloak/keycloak/releases/tag/26.6.2 web