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OpenAdvisories
Low · 3.7 CVE-2026-40969 EUVD-2026-26064GHSA-37w2-q6vh-45v6

Spring gRPC AuthenticationException message reflected to remote client

Published Apr 28, 2026 · Updated Apr 28, 2026 · Assigned by vmware

Description

The raw message of every server-side AuthenticationException is returned to the unauthenticated remote caller in the gRPC status description. This allows an attacker to obtain information about the authentication failure, which may be useful for further attacks.

Affected versions:
Spring gRPC: 1.0.0 - 1.0.2 (fixed in 1.0.3). Older, unsupported versions are also affected.

Affected products

VendorProductAffectedFixed
Spring Spring gRPC 1.0.0 – < 1.0.3 1.0.3

Affected packages

EcosystemPackageAffectedFixedRecord
Maven org.springframework.grpc:spring-grpc < 1.0.3 1.0.3 GHSA-37w2-q6vh-45v6

References