Medium [CVE-2026-17048] Vault-resolved rotated client secrets leaked via Admin REST API
This medium-severity Red Hat Linux advisory covers CVE-2026-17048 affecting Red Hat build of Keycloak 26.6.6.
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Summary
A flaw was found in the Keycloak Admin REST API, which is used to manage security realms and clients. The issue occurs when the system processes requests for rotated client secrets that are stored in a secure vault.
Due to improper boundary enforcement, a delegated administrator with view-only permissions can retrieve the actual resolved secret instead of the vault placeholder, leading to the exposure of sensitive credentials.
The Red Hat Product Security team has assessed the severity of this vulnerability as Moderate, given that exploitation requires high-privileged administrative access and the use of a non-default preview feature. Successful exploitation allows an attacker to disclose sensitive vault-backed rotated client secrets.
The vulnerability's root cause is a failure to properly mask resolved vault values in the rotated client secret API endpoint. Weakness: CWE-200.
Affected Red Hat products: Red Hat build of Keycloak 26.6; Red Hat build of Keycloak 26.6.6. Red Hat fixing advisory: RHSA-2026:56524, RHSA-2026:56523.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative. Check it before change work.
Official advisory · high-confidence parse· fetched 8 days ago·verify at source
- rhbk/keycloak-operator-bundle:26.6.6-1
- rhbk/keycloak-rhel9:26.6-12
- rhbk/keycloak-rhel9-operator:26.6-12
- keycloak-services
- rhbk-keycloak-rhel9/rhbk-keycloak-rhel9
- RHSA-2026:56524
- RHSA-2026:56523
Official advisory · high-confidence parse· fetched 8 days ago·verify at source
Mitigation checklist
- 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.
Official advisory · high-confidence parse· fetched 8 days ago·verify at source
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