CVE-2026-40968
Spring gRPC SecurityContext leaks across requests on authorization failure
- State
- Published
- Severity
- 4.3 Medium
- Published
- Apr 28, 2026
- Updated
- Apr 28, 2026
- Reserved
- Apr 16, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 4.3 Medium | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N | vmware |
Weaknesses
- CWE-653 Improper Isolation or Compartmentalization
Affected Products
| Product | Versions |
|---|---|
Spring gRPCSpring |
|
References
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