CVE-2026-16442A flaw was found in the SAML broker component of Keycloak, which is used to manage identity federation and user authentication.
Updated under an hour ago ()
Does this affect you?
It affects redhat build_of_keycloak. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
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.
- CVSS
- 9.8 CRITICAL (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-346
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Aug 10, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
redhat build_of_keycloak redhat:build_of_keycloak | from 26.4 before 26.4.14; from 26.6 before 26.6.5 | NVD |
References
- https://access.redhat.com/errata/RHSA-2026:50846vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:50847vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:50848vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:50849vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-16442vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2503138issue-tracking, vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.