Vulnerability-Lookup

GHSA-5XCF-8M2W-PH6F

Vulnerability from github – Published: 2026-07-16 03:32 – Updated: 2026-07-16 12:32

Details

A flaw was found in Keycloak. When the JSON Web Token (JWT) authorization grant preview feature is enabled and a user account is disabled, Keycloak fails to validate the user’s disabled status during JWT authorization grant processing. A remote attacker with low privileges can exploit this improper access control vulnerability by presenting a valid assertion token from an external identity provider to obtain a JWT for a disabled user. This allows unauthorized access to sensitive resources.

Severity

8.1 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

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  "affected": [],
  "aliases": [
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  "id": "GHSA-5xcf-8m2w-ph6f",
  "modified": "2026-07-16T12:32:27Z",
  "published": "2026-07-16T03:32:44Z",
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}

CVE-2026-1609 (GCVE-0-2026-1609)

Vulnerability from cvelistv5 – Published: 2026-07-16 00:26 – Updated: 2026-07-16 15:11

Title

Org.keycloak/keycloak-quarkus-server: keycloak: unauthorized access via jwt authorization grant with disabled users

Summary

Severity

8.1 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

CWE-284 - Improper Access Control

Assigner

redhat

References

5 references

URL	Tags
https://access.redhat.com/security/cve/CVE-2026-1609	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2435257	issue-trackingx_refsource_REDHAT
https://github.com/keycloak/keycloak/issues/46144
https://github.com/keycloak/keycloak/releases/tag…
https://security.access.redhat.com/data/csaf/v2/v…	x_sadp-csaf-vex

Impacted products

3 products

Vendor	Product	Version
Keycloak	Keycloak	Affected: 26.5.0 , < 26.5.3 (semver)
Red Hat	Red Hat JBoss Enterprise Application Platform 8	cpe:/a:redhat:jboss_enterprise_application_platform:8
Red Hat	Red Hat JBoss Enterprise Application Platform Expansion Pack	cpe:/a:redhat:jbosseapxp

Date Public

2026-02-09 18:59

Credits

Red Hat would like to thank Joy Gilbert and Reynaldo Immanuel for reporting this issue.

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JSON

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-5XCF-8M2W-PH6F

CVE-2026-1609 (GCVE-0-2026-1609)

Tags

Sightings

Nomenclature