CVE-2026-37982

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 3.1

6.8CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

EPSS

0.4% chance of exploitation in the next 30 days; higher than 37% of CVEs (scores of 2026-10-25)

CWE

CWE-294

Published

2026-05-19

Modified

2026-10-26

Record from

the NVD, synced 2026-10-26

Affected

• redhat:build_of_keycloak

Packages (OSV)

References

• https://access.redhat.com/errata/RHSA-2026:19596
• https://access.redhat.com/errata/RHSA-2026:19597
• https://access.redhat.com/security/cve/CVE-2026-37982
• https://bugzilla.redhat.com/show_bug.cgi?id=2455329

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