CVE-2026-37982

MEDIUMNVD 6.86.8—

6.8

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 v3: 6.8
EG Score: 6.8(high)
EPSS: 3.8%
KEV: Not listed

Published

May 19, 2026

Last Modified

May 20, 2026

References (4)

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

Vendor Advisories for CVE-2026-37982(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

GHSA-w4p5-rfh6-cwrv
GitHub Security AdvisoriesMedium
A flaw was found in Keycloak. This authentication vulnerability allows a remote attacker to...

Frequently asked(5)

What is CVE-2026-37982?

CVE-2026-37982 is a medium vulnerability published on May 19, 2026. 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…

When was CVE-2026-37982 disclosed?

CVE-2026-37982 was first published in the National Vulnerability Database on May 19, 2026, with the most recent update on May 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2026-37982 actively exploited?

CVE-2026-37982 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2026-37982?

CVE-2026-37982 has a CVSS v3 base score of 6.8 (NVD).

How do I remediate CVE-2026-37982?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-37982, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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CVE-2026-37982

📅 Published

🔄 Last Modified

🔗 References (4)

📣 Vendor Advisories for CVE-2026-37982(1)

❓ Frequently asked(5)