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GHSA-4g9c-3x4p-mfpp

Spring gRPC SecurityContext leaks across requests upon authorization failure

Source: GitHub Advisory Database (reviewed) Moderate CVE-2026-40968

Packages

EcosystemPackageAffectedFixed in
Maven org.springframework.grpc:spring-grpc < 1.0.3 1.0.3

Details

As written in the advisory (Markdown source, shown as plain text).

When an authenticated user is denied access to a gRPC method, their authenticated identity remains bound to the gRPC worker thread and can be inherited by a subsequent unauthenticated request on the same thread. This may allow the subsequent user to gain escalated permissions. Affected versions: Spring gRPC: 1.0.0 - 1.0.2 (fixed in 1.0.3). Older, unsupported versions are also affected.

References

External links from the advisory. They lead to third-party sites.