CVE-2026-40969
mediumpriority · track · 21EPSS 0.002 · 10 %ileEUUSEPSS · scored 2026-10-27
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 3.7–5.3
weaknesses
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affected products (3)
Products and version ranges known to be affected.
- Maven org.springframework.grpc:spring-grpc< 1.0.3osvUSpkg:maven/org.springframework.grpc/spring-grpc
advisories (1)
Vendor and ecosystem advisories describing this.
- GHSA-37w2-q6vh-45v6Spring gRPC AuthenticationException messages are reflected to remote client2026-04-28ghsa · osvUS
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.
also known as (3)
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sources
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references (4)
External citations — patches, advisories, analysis.
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