Medium severity4.2NVD Advisory· Published Apr 28, 2026· Updated Apr 30, 2026
CVE-2026-40968
CVE-2026-40968
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
org.springframework.grpc:spring-grpcMaven | < 1.0.3 | 1.0.3 |
Affected products
2Patches
Vulnerability mechanics
References
3- github.com/advisories/GHSA-4g9c-3x4p-mfppghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-40968ghsaADVISORY
- spring.io/security/cve-2026-40968nvdVendor AdvisoryWEB
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