CVE-2026-40969
Spring gRPC AuthenticationException messages are reflected to remote client
3.7
LOW
CVSS 3.1
EPSS 0.06%
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.
How to fix CVE-2026-40969
To remediate CVE-2026-40969, upgrade the affected package to a fixed version below.
- —upgrade to 1.0.3 or later
Is CVE-2026-40969 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 1.0.3
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | LOW3.7 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N |