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CVE-2026-9791

Keycloak-rhel9: organization data leak after feature disabled in keycloak

Published: May 28, 2026Updated: May 28, 2026 Sources: CVE List NVD
NVD MITRE
4.3CVSS
MEDIUM

A flaw was found in Keycloak. An authenticated user with existing organization membership can exploit this flaw by accessing user-facing APIs, such as the account API or by requesting an OpenID Connect (OIDC) token with the 'organization' scope. This allows organization metadata to be disclosed in tokens, even after an administrator has explicitly disabled the Organizations feature, potentially leading to incorrect authorization decisions by resource servers.

EPSS Score
N/A
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Workaround Only

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:LI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:NIntegrity
None
A:NAvailability
None

Weaknesses

CWE-863

Affected Products

Red Hat Build of Keycloak
Red Hat

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Workaround Available

MITRE ATT&CK

2 techniques
Initial Access
View detailed technique mapping

References

https://access.redhat.com/security/cve/CVE-2026-9791
access.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2482458
bugzilla.redhat.com

Timeline

Published
May 28, 2026
Last Updated
May 28, 2026

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