CVE-2026-9791

🔶 medium

Summary

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.

CVSS Score

4.3

Medium

EPSS Score

0.0

Exploit Probability

Published Date

2026-05-28

First Seen: 2026-05-29

📊 Relative Risk Intelligence

This CVE is Lower Risk - more severe than 5.4% of all 326,604 vulnerabilities in our database.

#308,897

Below average severity

Severity Percentile

🎯 CISA SSVC Assessment Updated: May 28, 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 Evan Hendra (Independent Security Researcher) 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-863

📦 Affected Products 1

Vendor	Product	Status	Affected Versions
redhat	build_of_keycloak	Affected	v-

🔗 References 2

https://access.redhat.com/security/cve/CVE-2026-9791

Mitigation Vendor Advisory

https://bugzilla.redhat.com/show_bug.cgi?id=2482458

Issue Tracking Vendor Advisory

🔗 Related CVEs 6

CVE ID	Severity	CVSS	EPSS	Summary	Published
CVE-2026-9792	🔶 medium	6.5	0.0	A flaw was found in Keycloak's Client Policies, specifically within the `org.keycloak.protocol.oidc` component. When cer...	2026-05-28
CVE-2026-9793	🔶 medium	5.9	0.0	A flaw was found in Keycloak. When a JSON Web Encryption (JWE) encrypted request object is submitted, Keycloak may incor...	2026-05-28
CVE-2026-9794	🔶 medium	5.3	0.0	A flaw was found in Keycloak. A remote, unauthenticated attacker can exploit this vulnerability by sending specially cra...	2026-05-28
CVE-2026-9795	⚠️ high	7.3	0.0	A flaw was found in Keycloak's Fine-Grained Admin Permissions (FGAPv2) feature. An administrator with limited client man...	2026-05-28
CVE-2026-9796	🔶 medium	6.5	0.0	A flaw was found in Keycloak. An authenticated administrator with the `manage-clients` role can exploit a Time-of-check ...	2026-05-28
CVE-2026-9798	🔶 medium	4.3	0.1	A flaw was found in Keycloak, an open-source identity and access management solution. When a user account is temporarily...	2026-05-28

These CVEs affect the same products