CVE-2026-37981

🔶 medium

Summary

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.

CVSS Score

4.3

Medium

EPSS Score

0.0

Exploit Probability

Published Date

2026-05-19

First Seen: 2026-05-20

📊 Relative Risk Intelligence

This CVE is Lower Risk - more severe than 5.4% of all 338,292 vulnerabilities in our database.

#320,047

Below average severity

Severity Percentile

🎯 CISA SSVC Assessment Updated: May 19, 2026

🔍 Exploitation Status

None

No known exploits

⚙️ Automatable

Requires human interaction

💥 Technical Impact

Partial

Limited system impact

🏆 Discovered By

Red Hat would like to thank XavLimSG for reporting this issue.

SSVC data provided by CISA

Last Modified 2026-06-03

Source NVD 🔗

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

CWE IDs (Weakness Types)

CWE-1220

📦 Affected Products 1

Vendor	Product	Status	Affected Versions
redhat	build_of_keycloak	Affected	> 26.4 < 26.4.12

🔗 References 4

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-2026-37981

Vendor Advisory

https://bugzilla.redhat.com/show_bug.cgi?id=2455326

Vendor Advisory

🔗 Related CVEs 6

CVE ID	Severity	CVSS	EPSS	Summary	Published
CVE-2026-12388	🔶 medium	6.5	0.2	A flaw was found in the Identity Provider (IdP) mapper component of Keycloak, which is used to manage how user informati...	2026-06-30
CVE-2026-14209	🔶 medium	4.3	0.2	A vulnerability was discovered in Keycloak's Admin UI extension that allows certain administrative users to bypass secur...	2026-06-30
CVE-2026-4629	🔶 medium	6.5	0.2	A flaw was found in Keycloak. A highly privileged user with `manage-clients` permission can exploit this vulnerability b...	2026-06-30
CVE-2026-9083	🔶 medium	4.9	0.5	A flaw was found in Keycloak. A realm administrator with the "manage-realm" role can exploit this vulnerability by submi...	2026-06-25
CVE-2026-9086	⚠️ high	7.3	0.4	A flaw was found in Keycloak. A remote attacker with administrative privileges, specifically those with `manage-client` ...	2026-06-25
CVE-2026-9099	⚠️ high	7.7	0.3	A flaw was found in Keycloak. A missing authorization check in the GroupResource.addChild() endpoint within the Admin RE...	2026-06-25

These CVEs affect the same products