medium4.3
CVE-2026-9791
Keycloak Vulnerable to Incorrect Authorization
Impact
A flaw was found in Keycloak. An authenticated user with existing organization membership can exploit this flaw by accessing user-facing APIs, such as the account API or by requesting an OpenID Connect (OIDC) token with the 'organization' scope. This allows organization metadata to be disclosed in tokens, even after an administrator has explicitly disabled the Organizations feature, potentially leading to incorrect authorization decisions by resource servers.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| maven | org.keycloak:keycloak-server-spi-private | >= 26.5.0, < 26.6.3 | 26.6.3 |
| maven | org.keycloak:keycloak-services | >= 26.5.0, < 26.6.3 | 26.6.3 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Redhat | Build Of Keycloak | All versions |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-4q93-v92x-p89f
- https://nvd.nist.gov/vuln/detail/CVE-2026-9791
- https://access.redhat.com/security/cve/CVE-2026-9791
- https://bugzilla.redhat.com/show_bug.cgi?id=2482458
- https://access.redhat.com/errata/RHSA-2026:25098
- https://access.redhat.com/errata/RHSA-2026:25097
- https://access.redhat.com/errata/RHSA-2026:30049
- https://access.redhat.com/errata/RHSA-2026:30050
- https://github.com/keycloak/keycloak/issues/49431
- https://github.com/keycloak/keycloak/pull/49541
- https://github.com/keycloak/keycloak/pull/49678
- https://github.com/keycloak/keycloak/pull/49680
- https://github.com/keycloak/keycloak/commit/0e706e7c83d1e971b48656ad9e674eec6adc225b
- https://github.com/keycloak/keycloak/commit/a77c60f2f3e0793046add44120579871e92553df
- https://github.com/keycloak/keycloak/commit/f19e1f2b4e998116d4e321f50ecf99c0f87b862f