CVE-2026-40969 json
Spring gRPC AuthenticationException message reflected to remote client
published 6mo ago modified 14d ago also GHSA-37w2-q6vh-45v6 , EUVD-2026-26064
- cvss
- 3.7
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 9%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- maven org.springframework.grpc:spring-grpc 1.0.3
- Spring Spring gRPC 1.0.3
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- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 6mo ago
Exploit prediction
0.20% chance of exploitation in the next 30 days, higher than 9% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 3.7 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N |
| NVD | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
| GitHub | 3.1 | 3.7 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| maven | org.springframework.grpc:spring-grpc | <1.0.3 |
1.0.3 |
Affected products
- Spring Spring gRPC
Classification
- Weakness
-
- CWE-209 Generation of Error Message Containing Sensitive Information
References
-
spring.io
/security/cve-2026-40969
web, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-40969
advisory
-
github.com
/spring-projects/spring-grpc
package
Sources
- CVE List CVE-2026-40969
- GitHub Advisory GHSA-37w2-q6vh-45v6
- NVD CVE-2026-40969
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.