medium6.8
CVE-2026-37982
Keycloak: Unauthorized account takeover via WebAuthn token replay
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| maven | org.keycloak:keycloak-services | < 26.6.2 | 26.6.2 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Redhat | Build Of Keycloak | from 26.4 before 26.4.12 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-w4p5-rfh6-cwrv
- https://nvd.nist.gov/vuln/detail/CVE-2026-37982
- https://access.redhat.com/security/cve/CVE-2026-37982
- https://bugzilla.redhat.com/show_bug.cgi?id=2455329
- https://access.redhat.com/errata/RHSA-2026:19597
- https://access.redhat.com/errata/RHSA-2026:19596
- https://github.com/keycloak/keycloak/pull/49126
- https://github.com/keycloak/keycloak/commit/2d1a24f501454a44c52daa62855419b31dc499c1
- https://github.com/keycloak/keycloak/releases/tag/26.6.2