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TI-2026-29620 Aliases CVE-2026-40969GHSA-37w2-q6vh-45v6

Spring gRPC AuthenticationException message reflected to remote client

Priority LOW 23CWE-209Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
Low · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-209.

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.002 9th percentileScored 2026-11-07
Fix Fixed Spring gRPC (Spring): 1.0.3org.springframework.grpc:spring-grpc (Maven): 1.0.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
VMwareSpring gRPC1.0.0 to before 1.0.31.0.3Patch availableCNA
—org.springframework.grpc:spring-grpc (Maven)before 1.0.31.0.3Patch availableGHSA-37w2-q6vh-45v6
  • Spring gRPC VendorVMware Affected 1.0.0 to before 1.0.3 Fixed in 1.0.3 Patch available CNA
  • org.springframework.grpc:spring-grpc (Maven) Vendor— Affected before 1.0.3 Fixed in 1.0.3 Patch available GHSA-37w2-q6vh-45v6

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:vmware:spring_grpc:*:*:*:*:*:*:*:*before 1.0.3VulnerableVMware
  • cpe:2.3:a:vmware:spring_grpc:*:*:*:*:*:*:*:* Versions before 1.0.3 Vulnerable ·VMware

Remediation

  • Fix · CNA Spring gRPC (Spring) Fixed in 1.0.3
  • Fix · GHSA-37w2-q6vh-45v6 org.springframework.grpc:spring-grpc (Maven) Fixed in 1.0.3 Advisory →

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Spring gRPC 1.0.3

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2026-29619 Spring gRPC SecurityContext leaks across requests on authorization failurePriority LOW 37
    Show all 2 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-40969
  2. 2026-10-03 Alias added: GHSA-37w2-q6vh-45v6

References

Advisory 2

Other 1

  • TI-2026-29619 Spring gRPC SecurityContext leaks across requests on authorization failure CVSS 3.1HIGH 8.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences