CVE-2026-15943: Keycloak-services: oidc idp update reuses masked client secret after token url change
Red Hat · Red Hat build of Keycloak 26.6
Vendor fix available · Affected: Red Hat build of Keycloak 26.6 · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 37% of scored CVEs
DescriptionCVE.org
A flaw was found in the Keycloak keycloak-services component, which handles the management of identity providers. The issue occurs when a delegated administrator updates an OIDC identity provider using a masked client secret sentinel value. Due to improper validation, Keycloak reuses the existing real secret even if security-sensitive fields like the token URL have been changed, allowing an attacker to redirect and capture the secret.
Affected products9
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- Red Hat · Red Hat build of Keycloak 26.6Versions not stated
- Red Hat · Red Hat build of Keycloak 26.6Versions not stated
- Red Hat · Red Hat build of Keycloak 26.6Versions not stated
- Red Hat · Red Hat build of Keycloak 26.6.8Versions not stated
- Red Hat · Red Hat build of Keycloak 26.6.8Versions not stated
- Red Hat · Red Hat build of Keycloak 26.6.8Versions not stated
- Red Hat · Red Hat Data Grid 8Versions not stated
- Red Hat · Red Hat JBoss Enterprise Application Platform Expansion PackVersions not stated
- Red Hat · Red Hat Single Sign-On 7Versions not stated
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CoverageNo articles yet
No CyberSIXT article names CVE-2026-15943 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.