CVE-2026-37981

Name: CVE-2026-37981
Creator: NVD / NIST
Published: 2026-05-19T12:16:18.463+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.3/10EPSS 0.37%

Last modified Jun 17, 2026

CVE-2026-37981 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. A flaw was found in Keycloak. A broken access control vulnerability in the Account Resources user lookup endpoint allows a remote authenticated user, who owns at least one User-Managed Access (UMA) resource, to enumerate and harvest personally identifiable information (PII) for all realm users. EPSS estimates a 0.37% chance of exploitation in the next 30 days.

Description

A flaw was found in Keycloak. A broken access control vulnerability in the Account Resources user lookup endpoint allows a remote authenticated user, who owns at least one User-Managed Access (UMA) resource, to enumerate and harvest personally identifiable information (PII) for all realm users. By sending crafted requests with arbitrary usernames or email values, the endpoint returns full profile objects for unrelated users. This leads to broad profile-level information disclosure.

Metrics

CVSS 3.1

4.3/10

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

EPSS Probability

0.37%

28.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-1220

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-2026-37981Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2455326Vendor Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2026-37981?

How severe is CVE-2026-37981?

CVE-2026-37981 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 0.37% probability of exploitation in the next 30 days.

How do I fix CVE-2026-37981?

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-2026-37981?

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

Scan your code now

Source: NVD / NIST