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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-15571 Detail

Description

A flaw was found in the legacy client-initiated account-linking endpoint of Keycloak, a widely used open-source identity and access management solution. The mechanism used to protect the account-linking process from unauthorized requests relies on a hash that can be predicted by a malicious OIDC client. By tricking a user into authenticating, an attacker-controlled client can forge a valid linking URL to connect the victim's account to an attacker's external identity. This results in a full account takeover, allowing the attacker to log in as the victim.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://access.redhat.com/errata/RHSA-2026:56523 Red Hat, Inc.
https://access.redhat.com/errata/RHSA-2026:56524 Red Hat, Inc.
https://access.redhat.com/security/cve/CVE-2026-15571 Red Hat, Inc.
https://bugzilla.redhat.com/show_bug.cgi?id=2499591 Red Hat, Inc.

Weakness Enumeration

CWE-ID CWE Name Source
CWE-341 Predictable from Observable State Red Hat, Inc.  

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-15571
NVD Published Date:
08/18/2026
NVD Last Modified:
08/18/2026
Source:
Red Hat, Inc.