High severity7.4NVD Advisory· Published Aug 5, 2026· Updated Aug 10, 2026
CVE-2026-16442
CVE-2026-16442
Description
A flaw was found in the SAML broker component of Keycloak, which is used to manage identity federation and user authentication. The issue occurs because the IdP-initiated Single Sign-On endpoint fails to check if a provider is restricted to account linking only. This allows an attacker with control over a linked upstream identity to bypass login restrictions and gain full access to a local user account.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
3Patches
Vulnerability mechanics
References
6- access.redhat.com/errata/RHSA-2026:50846nvdVendor Advisory
- access.redhat.com/errata/RHSA-2026:50847nvdVendor Advisory
- access.redhat.com/errata/RHSA-2026:50848nvdVendor Advisory
- access.redhat.com/errata/RHSA-2026:50849nvdVendor Advisory
- access.redhat.com/security/cve/CVE-2026-16442nvdVendor Advisory
- bugzilla.redhat.com/show_bug.cginvdIssue TrackingVendor Advisory
News mentions
1- Keycloak: Three High Severity Vulnerabilities Disclosed Together in SAML, DCR, and Auth ServicesVypr Intelligence · Aug 5, 2026