Secuno
ENNL
Book demo

CVE-2026-16102

Redhat Build Of Keycloak broken access control

8.1 HIGHEPSS 0.46%
  1. Published5 Aug 2026

Description

A flaw was found in the Dynamic Client Registration (DCR) component of Keycloak, an identity and access management solution. The default DCR policy fails to properly validate the claim path for User Property mappers, allowing them to write values to sensitive internal claim locations. An attacker with a standard user account and a limited Initial Access Token can exploit this to forge administrative roles in their access token. This allows the attacker to take over other clients, steal confidential secrets, and potentially gain full administrative control over the realm.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Affected products

Redhat Build Of Keycloak≥ 26.4 < 26.4.14 · ≥ 26.6 < 26.6.5
Redhat Data Grid8.0
Redhat Jboss Enterprise Application Platform Expansion Packall versions
Redhat Single Sign-on7.0

Remediation

Fixed in
Redhat Build Of Keycloak≥ 26.4.14

References

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

CVE-2026-1075109.1
An authenticated high privilege user can inject arguments in troubleshooting commands…
CVE-2026-764989.8
As part of Cisco's ongoing commitment to proactive security and product quality, the…
CVE-2026-764638.8
As part of Cisco's ongoing commitment to proactive security and product quality, the…
CVE-2026-764559.8
As part of Cisco's ongoing commitment to proactive security and product quality, the…
CVE-2026-976808.3
IBM Langflow OSS 1.0.0 through 1.12.2 could allow a remote authenticated attacker to…
CVE-2026-1043358.8
IBM Langflow OSS 1.0.0 through 1.12.2 could allow a remote authenticated attacker to…

Frequently asked

Is CVE-2026-16102 being actively exploited?

CVE-2026-16102 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.46%.

How severe is CVE-2026-16102?

CVE-2026-16102 has a CVSS 3.1 base score of 8.1, rated high. EPSS estimates a 0.46% probability of exploitation.

Which products are affected by CVE-2026-16102?

Affected products include Redhat Build Of Keycloak, Redhat Data Grid, Redhat Jboss Enterprise Application Platform Expansion Pack, Redhat Single Sign-on.

How do I fix CVE-2026-16102?

Upgrade affected software to a fixed version, for example Redhat Build Of Keycloak 26.4.14 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-16102 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

See how prioritisation worksBook a demo

Get Patch this first every Monday

Five vulnerabilities that matter this week, ranked on real exploitation. Plain language, one email, no spam.

You can unsubscribe with one click from every issue. We handle your details as described in our privacy policy.

Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.