CVE-2026-11986 (CVSS 4.9)

Description

A flaw was found in the admin-ui-ext component of Keycloak, which provides extended administrative user interface capabilities. The issue occurs because certain bulk role-removal endpoints fail to perform granular permission checks when deleting role mappings. This allows a delegated administrator with limited permissions to remove highly privileged roles from other users or groups, potentially disrupting administrative access control.

Is your site exposed to CVE-2026-11986?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

4.9

MEDIUM

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

EPSS — Exploit Prediction

0.0020

Probability of exploitation

0.10%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-425 CWE-425

References

Other References

https://access.redhat.com/security/cve/CVE-2026-11986 https://bugzilla.redhat.com/show_bug.cgi?id=2487906

Frequently Asked Questions

What is CVE-2026-11986? +

A flaw was found in the admin-ui-ext component of Keycloak, which provides extended administrative user interface capabilities. The issue occurs because certain bulk role-removal endpoints fail to perform granular permission checks when deleting role mappings. This allows a delegated administrator with limited permissions to remove highly privileged roles from other users or groups, potentially disrupting administrative access control. It has a CVSS v3.1 base score of 4.9 (MEDIUM).

How severe is CVE-2026-11986? +

CVE-2026-11986 has a CVSS v3.1 score of 4.9 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0020, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-11986? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2026-34028

The Wertheim SafeController Software, AssemblyVersion 6.15.8328.28014, exposes web-accessible file paths that are not protected by an authorization scheme. An unauthenticated …

CVE-2025-1542

Improper permission control vulnerability in the OXARI ServiceDesk application could allow an attacker using a guest access or an unprivileged …

CVE-2025-26381

Successful exploitation of this vulnerability could allow an attacker to gain unauthorized access to sensitive information.

CVE-2025-65011

In WODESYS WD-R608U router (also known as WDR122B V2.0 and WDR28) an unauthorised user can view configuration files by directly …

CVE-2024-0204 9.8

Authentication bypass in Fortra's GoAnywhere MFT prior to 7.4.1 allows an unauthorized user to create an admin user via the …

CVE-2024-24592 9.8

Lack of authentication in all versions of the fileserver component of Allegro AI’s ClearML platform allows a remote attacker to …

CVE-2026-11986