Improper Isolation or Compartmentalization Affecting org.springframework.grpc:spring-grpc-core package, versions [,1.0.3)
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 Apr 2026
- disclosed28 Apr 2026
- creditUnknown
Introduced: 28 Apr 2026
NewCVE-2026-40968 (opens in a new tab)How to fix?
Upgrade org.springframework.grpc:spring-grpc-core to version 1.0.3 or higher.
Overview
Affected versions of this package are vulnerable to Improper Isolation or Compartmentalization due to improper isolation of the SecurityContext. When an authenticated user experiences an authorization failure, their security context is not properly cleared from the underlying gRPC worker thread. If a subsequent unauthenticated request is processed by this exact same thread, it can inadvertently inherit the previous user's authenticated identity. This flaw allows an unauthenticated attacker to bypass security controls and perform unauthorized actions.