CVE-2026-37982

Name: CVE-2026-37982
Creator: NVD / NIST
Published: 2026-05-19T12:16:18.61+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.8/10EPSS 0.44%

Last modified Jun 17, 2026

CVE-2026-37982 is a medium-severity vulnerability rated 6.8/10 on the CVSS scale. A flaw was found in Keycloak. This authentication vulnerability allows a remote attacker to replay `ExecuteActionsActionToken` tokens within Keycloak's WebAuthn (Web Authentication) flow. EPSS estimates a 0.44% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.8/10

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

EPSS Probability

0.44%

35.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-294

Affected Software

Vendor	Product	Versions
Redhat	Build Of Keycloak	>= 26.4, < 26.4.12

References

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

Timeline

Published: May 19, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-37982?

How severe is CVE-2026-37982?

CVE-2026-37982 has a CVSS score of 6.8/10 (MEDIUM severity). The EPSS model estimates a 0.44% probability of exploitation in the next 30 days.

How do I fix CVE-2026-37982?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-37982?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST