How severe is CVE-2026-16106?

CVE-2026-16106 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2026-16106 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-16106?

CVE-2026-16106 affects Redhat Build Of Keycloak. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-16106?

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

When was CVE-2026-16106 published?

CVE-2026-16106 was published on 2026-07-17 and last updated on 2026-09-16.

CVE-2026-16106

CVE-2026-16106 is a medium-severity vulnerability in Redhat Build Of Keycloak with a CVSS 3.x base score of 4.9. 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-1220.

Key facts

Severity: Medium (CVSS 3.x base score 4.9)
EPSS exploit prediction: 0% (35th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-1220
Affected product: Redhat Build Of Keycloak
Published: 2026-07-17
Last modified: 2026-09-16

Description

A flaw was found in the admin REST API of Keycloak, a solution for identity and access management. The issue occurs when a delegated administrator attempts to remove a child role from a composite role. Due to missing authorization checks, an attacker with limited administrative permissions can remove privileged roles they are not authorized to manage, leading to a loss of access for other users and administrators.

Frequently asked questions

What is CVE-2026-16106?: A flaw was found in the admin REST API of Keycloak, a solution for identity and access management. The issue occurs when a delegated administrator attempts to remove a child role from a composite role. Due to missing authorization checks, an attacker with limited administrative permissions can remove privileged roles they are not authorized to manage, leading to a loss of access for other users and administrators.
How severe is CVE-2026-16106?: CVE-2026-16106 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2026-16106 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-16106?: CVE-2026-16106 affects Redhat Build Of Keycloak. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-16106?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-16106 published?: CVE-2026-16106 was published on 2026-07-17 and last updated on 2026-09-16.

References

Affected products (1)

cpe:2.3:a:redhat:build_of_keycloak:-:*:*:*:-:*:*:*

More vulnerabilities in Redhat Build Of Keycloak

CVE-2026-15572 — High (CVSS 8.8): A flaw was found in Keycloak's Dynamic Client Registration (DCR) security policy management. The "Allowed Protocol…
CVE-2026-3047 — High (CVSS 8.8): A flaw was found in org.keycloak.broker.saml. When a disabled Security Assertion Markup Language (SAML) client is…
CVE-2026-16102 — High (CVSS 8.1): A flaw was found in the Dynamic Client Registration (DCR) component of Keycloak, an identity and access management…
CVE-2026-15573 — High (CVSS 8.1): A flaw was found in Keycloak's Authorization Services. The component responsible for matching request paths to security…
CVE-2026-1609 — High (CVSS 8.1): A flaw was found in Keycloak. When the JSON Web Token (JWT) authorization grant preview feature is enabled and a user…
CVE-2026-11800 — High (CVSS 8.1): A flaw was found in Keycloak. This JWT algorithm confusion vulnerability in the JWT Authorization Grant flow allows an…

All CVEs affecting Redhat Build Of Keycloak →

Other CWE-1220 vulnerabilities

CVE-2025-31201 — Critical (CVSS 9.8): This issue was addressed by removing the vulnerable code. This issue is fixed in iOS 18.4.1 and iPadOS 18.4.1, macOS…
CVE-2022-2475 — Critical (CVSS 9.8): Haas Controller version 100.20.000.1110 has insufficient granularity of access control when using the "Ethernet Q…
CVE-2026-6356 — Critical (CVSS 9.6): A vulnerability in the web application allows standard users to escalate their privileges to those of a super…
CVE-2026-6388 — Critical (CVSS 9.1): A flaw was found in ArgoCD Image Updater. This vulnerability allows an attacker, with permissions to create or modify…
CVE-2025-8053 — Critical (CVSS 9.1): Insufficient Granularity of Access Control vulnerability in opentext Flipper allows Exploiting Incorrectly Configured…
CVE-2025-7493 — Critical (CVSS 9.1): A privilege escalation flaw from host to domain administrator was found in FreeIPA. This vulnerability is similar to…

Browse all CWE-1220 vulnerabilities →