Spring gRPC SecurityContext leaks across requests upon authorization failure
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.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | org.springframework.grpc:spring-grpc | < 1.0.3 | 1.0.3 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N- Weakness (CWE)
CWE-653- Platform
- Java / Kotlin (Maven)
- Package
org.springframework.grpc:spring-grpc- Disclosed
- 28.04.2026
- Updated
- 11.10.2026 12:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-4g9c-3x4p-mfpp - CC BY 4.0
Vulnerability history: org.springframework.grpc:spring-grpc
All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 2
- First → latest
- 04.2026 04.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Medium 1
- Low 1
Disclosures per year
- 2026: 2
-
Spring gRPC SecurityContext leaks across requests upon authorization failure this entry
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