EUVD-2026-26054CVSS VectorNVD
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
Lifecycle Timeline
3DescriptionNVD
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.
AnalysisAI
Spring gRPC 1.0.0 through 1.0.2 inherits authenticated user identity on gRPC worker threads after access denial, allowing a subsequent unauthenticated request on the same thread to gain escalated permissions. The vulnerability requires an authenticated attacker with prior knowledge of thread reuse patterns and affects only configurations where both authenticated and unauthenticated requests share gRPC worker threads. …
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External POC / Exploit Code
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