CVE•Published 2026-05-19•Modified 2026-06-03•0 articles on news•5 live references•NVD data

CVE-2026-37981Redhat · Build_of_keycloak

Vulnerability data via NVD (ingested)

CVSS v3.1

4.3

MEDIUM

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

EPSS percentile

—

Weaknesses (CWE)

CWE-1220Insufficient Granularity of Access Control

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.

Timeline

Published 2026-05-19

Modified 2026-06-03

External references

NVD MITRE Exploit-DB Sploitus VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-37981

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Redhat Build Of Keycloak"

All exposed Redhat Build Of Keycloak instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Build Of Keycloak"

HTTP body or banner mentions "Build Of Keycloak" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-37981