CVE-2026-40969 — Spring gRPC AuthenticationException message reflected to remote client

CVE-2026-40969

Spring gRPC AuthenticationException message reflected to remote client PUBLISHED

Description (CNA)

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 (CNA)

Vendor / product	Versions
Spring / Spring gRPC	affected 1.0.0 before 1.0.3

CWE

CWE-209

References

https://spring.io/security/cve-2026-40969

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.