Time-of-check Time-of-use (TOCTOU) Race Condition Affecting org.keycloak:keycloak-services package, versions [0,26.7.0)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published29 May 2026
- disclosed28 May 2026
- creditDaniel Peters, Lior Moshe, Uri Rolls
Introduced: 28 May 2026
CVE-2026-9796 (opens in a new tab)How to fix?
Upgrade org.keycloak:keycloak-services to version 26.7.0 or higher.
Overview
org.keycloak:keycloak-services is an open source identity and access management solution for modern applications and services.
Affected versions of this package are vulnerable to Time-of-check Time-of-use (TOCTOU) Race Condition in the role rename endpoint. An attacker can gain unauthorized administrative privileges by exploiting a timing window between permission checks and their enforcement. The attacker can escalate their access to realm-wide administrative control, even after their original permissions are revoked and across system reboots.