CVE-2026-9800
published 2026-06-25CVE-2026-9800: A flaw was found in Keycloak Policy Enforcer. This vulnerability allows any authenticated user to bypass all authorization policies, including role, scope, and…
PriorityP356high8.1CVSS 3.1
AVNACLPRLUINSUCHIHAN
EPSS
0.65%
50.9th percentile
A flaw was found in Keycloak Policy Enforcer. This vulnerability allows any authenticated user to bypass all authorization policies, including role, scope, and User-Managed Access (UMA) permission checks. By including the configured access-denied page path within a request URL, either as a path segment or a query parameter, an attacker can gain unauthorized access to protected resources.
Affected
6 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| redhat | build_of_keycloak | >= 26.4 < 26.4.13 | 26.4.13 |
| redhat | build_of_keycloak | 26.6 – 26.6.4 | — |
| rhbk | keycloak-operator-bundle_26.6.4-2 | — | — |
| rhbk | keycloak-rhel9 | — | — |
| rhbk | keycloak-rhel9-operator_26.6-8 | — | — |
| rhbk | keycloak-rhel9_26.6-8 | — | — |
CVSS provenance
nvdv3.18.1HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
vendor_redhat8.1HIGH
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VulDB
Keycloak on Red Hat Query Parameter comparison using wrong factors (EUVD-2026-39471 / WID-SEC-2026-2093)
vuldb·2026-09-01·CVSS 8.1
CVE-2026-9800 [HIGH] Keycloak on Red Hat Query Parameter comparison using wrong factors (EUVD-2026-39471 / WID-SEC-2026-2093)
A vulnerability, which was classified as critical, has been found in Keycloak on Red Hat. Affected is an unknown function of the component Query Parameter Handler. The manipulation leads to comparison using wrong factors.
This vulnerability is referenced as CVE-2026-9800. Remote exploitation of the attack is possible. No exploit is available.
GHSA
A flaw was found in Keycloak Policy Enforcer.
ghsa_unreviewed·2026-06-25
CVE-2026-9800 [HIGH] CWE-1025 A flaw was found in Keycloak Policy Enforcer.
A flaw was found in Keycloak Policy Enforcer. This vulnerability allows any authenticated user to bypass all authorization policies, including role, scope, and User-Managed Access (UMA) permission checks. By including the configured access-denied page path within a request URL, either as a path segment or a query parameter, an attacker can gain unauthorized access to protected resources.
Red Hat
keycloak: Keycloak Policy Enforcer: Authorization bypass via incorrect URI comparison
vendor_redhat·2026-05-19·CVSS 8.1
CVE-2026-9800 [HIGH] CWE-1025 keycloak: Keycloak Policy Enforcer: Authorization bypass via incorrect URI comparison
keycloak: Keycloak Policy Enforcer: Authorization bypass via incorrect URI comparison
A flaw was found in Keycloak Policy Enforcer. This vulnerability allows any authenticated user to bypass all authorization policies, including role, scope, and User-Managed Access (UMA) permission checks. By including the configured access-denied page path within a request URL, either as a path segment or a query parameter, an attacker can gain unauthorized access to protected resources.
Mitigation: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
No detection rules found.
No public exploits indexed.
https://access.redhat.com/errata/RHSA-2026:30049https://access.redhat.com/errata/RHSA-2026:30050https://access.redhat.com/errata/RHSA-2026:30083https://access.redhat.com/errata/RHSA-2026:30084https://access.redhat.com/errata/RHSA-2026:36002https://access.redhat.com/errata/RHSA-2026:36013https://access.redhat.com/errata/RHSA-2026:50846https://access.redhat.com/errata/RHSA-2026:50847https://access.redhat.com/security/cve/CVE-2026-9800https://bugzilla.redhat.com/show_bug.cgi?id=2482472https://access.redhat.com/errata/RHSA-2026:30049https://access.redhat.com/errata/RHSA-2026:30050https://access.redhat.com/errata/RHSA-2026:30083https://access.redhat.com/errata/RHSA-2026:30084https://access.redhat.com/errata/RHSA-2026:50846https://access.redhat.com/errata/RHSA-2026:50847https://access.redhat.com/security/cve/CVE-2026-9800https://bugzilla.redhat.com/show_bug.cgi?id=2482472https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-9800.json
2026-06-25
Published