3.1

CVE-2026-2366: redhat build_of_keycloak

CVSS: 3.1v3.1LowAnalyzed
AliasesGHSA-r8jr-wg88-fq5cBIT-keycloak-2026-2366
Published 12-03-2026Last modified 02-04-2026
Open JSON

Vulnerability summary

CVE-2026-2366 is a low (CVSS 3.1) vulnerability in redhat build_of_keycloak. EPSS estimates a 0.27% chance of exploitation in the next 30 days, higher than 18.4% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
3.1/10
010
Low · v3.1 (CVE.org)
EPSS score
0.27%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Timeline

  1. 12-03-2026
    PublishedVulnerability first disclosed.
  2. 02-04-2026
    Last modifiedVulnerability information updated.

Description

A flaw was found in Keycloak. An authorization bypass vulnerability in the Keycloak Admin API allows any authenticated user, even those without administrative privileges, to enumerate the organization memberships of other users. This information disclosure occurs if the attacker knows the victim's unique identifier (UUID) and the Organizations feature is enabled.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.27%

Chance of exploitation in the next 30 days

Percentile

18%

Versus all other CVEs

30-day change

0.00 pp

From 0.27% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.27%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (bugzilla.redhat.com)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

@keycloak1 product
  • keycloak-admin-client≤ 26.5.5
Org.keycloak1 product
  • keycloak-js-admin-client≤ 26.5.5
Redhat1 product

3 vendors · 3 products

References

7 links