How severe is CVE-2026-2366?

CVE-2026-2366 has a CVSS 3.x base score of 3.1, rated low severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2026-2366 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-2366?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-2366 have an EU (EUVD) identifier?

Yes. CVE-2026-2366 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-11553.

When was CVE-2026-2366 published?

CVE-2026-2366 was published on 2026-03-12 and last updated on 2026-06-17.

CVE-2026-2366

CVE-2026-2366 is a low-severity vulnerability with a CVSS 3.x base score of 3.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-639.

Key facts

Severity: Low (CVSS 3.x base score 3.1)
EPSS exploit prediction: 0% (19th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-11553
Weakness: CWE-639
Published: 2026-03-12
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-2366?: 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.
How severe is CVE-2026-2366?: CVE-2026-2366 has a CVSS 3.x base score of 3.1, rated low severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2026-2366 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-2366?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-2366 have an EU (EUVD) identifier?: Yes. CVE-2026-2366 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-11553.
When was CVE-2026-2366 published?: CVE-2026-2366 was published on 2026-03-12 and last updated on 2026-06-17.

References

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