CVE-2026-40969CWE-209

Spring gRPC AuthenticationException message reflected to remote client

Low · published April 28, 2026

CVSS v3.1
3.7
EPSS
0%
Percentile
25.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
3.7 · LOW
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00332 · 25.2th percentile
Weakness
CWE-209 · Generation of Error Message Containing Sensitive Information
Published
2026-04-28T14:54Z
EPSS history
Timeline
  • 28 APR 14:54Z
    Spring gRPC AuthenticationException message reflected to remote client
    cvelistv5