CVE-2026-37982
mediumA flaw was found in Keycloak.
Vendor / product: Redhat — build of keycloak
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.
CVSS
6.8
6.8 (CVSS v3.1)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N Severity source: NVD CVSS v3.1 (secalert@redhat.com)
Timeline (UTC)
Published: 2026-05-19 12:16
Modified: 2026-10-29 10:17
NVD status: Modified
Last synced 48 minutes ago
Verified against the source API 2026-10-29 10:29 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
redhat / build_of_keycloak ≥26.4 <26.4.12
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Vendor advisory: 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
References
- https://access.redhat.com/errata/RHSA-2026:19596 secalert@redhat.com
- https://access.redhat.com/errata/RHSA-2026:19597 secalert@redhat.com
- https://access.redhat.com/security/cve/CVE-2026-37982 secalert@redhat.com
- https://bugzilla.redhat.com/show_bug.cgi?id=2455329 secalert@redhat.com
Data sources
NVD CVE API 2.0 — fetched 2026-10-29 10:29 UTC · record ↗