CVE-2026-16102

8.1 HIGH

Published 2026-08-05 · Updated 2026-08-06

AI risk analysis

Summary: The flaw in Keycloak's Dynamic Client Registration component allows attackers to write values to sensitive claim locations, potentially forging administrative roles and gaining full control over the realm.
Exploitability: Exploitation requires a standard user account and an Initial Access Token but is considered high risk due to its potential for severe impact.
Blast radius: If exploited, this flaw can lead to unauthorized access, data theft, and complete compromise of the Keycloak instance.
Prioritized remediation: Disable or restrict User Property mappers that write to sensitive claim locations or update to a patched version of Keycloak.

auth-bypassmisconfigurationidentity-managementkeycloak

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD 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 vector

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

Weaknesses

CWE-284

All references

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.