TI-2026-82313 Aliases CVE-2026-117627 GHSA-4mr3-gfq4-fhxv

Keycloak JWT grant skips identity provider login restrictions

LOW 24CWE-862Published 2026-10-29 · Updated 2026-11-03

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: Low · Low · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-862.

Summary

Red Hat Build of Keycloak fails to apply identity provider login restrictions, such as claim filtering, in the JWT Authorization Grant flow (CWE-862). Browser logins enforce these checks for OIDC and Google identity providers, but the JWT grant skips them. An authenticated client with low privileges can obtain access tokens for a user whose identity provider claims should have blocked the login.

Written with Claude Haiku 5.5 from the sources below · 2026-11-03

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00246 16th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Red Hat	Red Hat Build of Keycloak	—	—	No fix listed	CNA
Red Hat	Red Hat Build of Keycloak	—	—	No fix listed	CNA
Red Hat	Red Hat Single Sign-On 7	—	—	Not affected	CNA

Red Hat Build of Keycloak VendorRed Hat Affected — Fixed in — No fix listed CNA
Red Hat Build of Keycloak VendorRed Hat Affected — Fixed in — No fix listed CNA
Red Hat Single Sign-On 7 VendorRed Hat Affected — Fixed in — Not affected CNA

CPE names CNA · 2

CPE	Versions	Role	Vendor
cpe:/a:redhat:build_keycloak:	—	—	Red Hat
cpe:/a:redhat:red_hat_single_sign_on:7	7	—	Red Hat

cpe:/a:redhat:build_keycloak: Versions — — ·Red Hat
cpe:/a:redhat:red_hat_single_sign_on:7 Versions 7 — ·Red Hat

Remediation

The sources list no fixed version for Red Hat Build of Keycloak. Red Hat's plan for Red Hat Build of Keycloak is listed as none available. Red Hat Single Sign-On 7 is listed as not affected.

Written with Claude Haiku 5.5 from the sources below · 2026-11-03

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat Build of Keycloak	Affected	No fix yet

Not affected: 1 product

Red Hat Single Sign-On 7

Timeline

2026-10-29 Threatist record created from CVE-2026-117627
2026-10-29 Affected versions changed · Red Hat
2026-10-29 CVSS score added · Red Hat
2026-10-29 Alias added: GHSA-4mr3-gfq4-fhxv
2026-10-30 Priority changed: MEDIUM → LOW
2026-11-03 CISA SSVC decision points changed

References

Other 2

TI-2019-15875 Protection mechanism failure in Jenkins Pipeline: Groovy Plugin KEVCVSS 3.1CRITICAL 9.9
TI-2019-15874 Protection mechanism failure in Jenkins Script Security Plugin KEVCVSS 3.1CRITICAL 9.9
TI-2019-08259 Underflow in PHP-FPM can lead to RCE KEVCVSS 3.1CRITICAL 9.8
TI-2019-05363 Code injection in Elastic Kibana KEVCVSS 3.1CRITICAL 10.0
TI-2019-03949 Out-of-bounds write in ESXi and Horizon DaaS KEVCVSS 3.1CRITICAL 9.8
TI-2018-16080 A code execution vulnerability exists in the Stapler web framework used by Jenkins 2.153… KEVCVSS 3.1CRITICAL 9.8

See all 7413 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences