CVE-2026-40969 — Spring gRPC AuthenticationException message reflected to remote client
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 i…
Published: 2026-04-28 · CVSS: 3.7 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7