Medium 5.4Published Oct 29, 2026

CVE-2026-117627Keycloak-services: keycloak-services: jwt authorization grant bypasses identity provider login restrictions

Updated under an hour ago (Oct 29, 2026, 2:40 PM ET)

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It affects Red Hat Build of Keycloak and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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A flaw was found in the JWT Authorization Grant implementation of the keycloak-services component. When an OIDC or Google identity provider is configured with specific login restrictions, such as claim filtering, these checks are correctly applied during standard browser logins but are skipped during the JWT-based grant flow. This allows an authenticated client to obtain access tokens for a user even if their identity provider claims should have blocked the login.

CVSS: 5.4 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Weakness (CWE): CWE-862
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: redhat
NVD analysis: Awaiting Analysis
Record last updated: Oct 29, 2026
First seen by InfoSec Signals: Oct 29, 2026

Affected products

Affected products

Red Hat Red Hat Build of Keycloak redhat:build_keycloak	All versions	CNA record
Red Hat Red Hat Single Sign-On 7 redhat:red_hat_single_sign_on	7	CNA record

References

References

https://access.redhat.com/security/cve/CVE-2026-117627	vdb-entry, x-refsource-redhat
https://bugzilla.redhat.com/show_bug.cgi?id=2561959	issue-tracking, x-refsource-redhat

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.