CVE-2026-117627 Keycloak-services: keycloak-services: jwt authorization grant bypasses identity provider login restrictions
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-117627?
CVE-2026-117627 is a medium-severity vulnerability in Red Hat Build of Keycloak, published on 29 Oct 2026.
Official description
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.
Weakness: CWE-862
Which versions are affected by CVE-2026-117627?
How do I fix CVE-2026-117627?
No fix has been published for CVE-2026-117627 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-117627 being exploited?
There is no known exploitation of CVE-2026-117627 in the wild and no public exploit code.
Sources
Also known as GHSA-4mr3-gfq4-fhxv.