# CVE-2026-40968

## Summary

- **CVE ID:** CVE-2026-40968
- **Severity:** MEDIUM
- **CVSS Score:** 4.3 (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N)
- **CWE:** CWE-653
- **Published:** Apr 28, 2026
- **Last Modified:** Apr 28, 2026

## Description

When an authenticated user is denied access to a gRPC method, their authenticated identity remains bound to the gRPC worker thread and can be inherited by a subsequent unauthenticated request on the same thread. This may allow the subsequent user to gain escalated permissions.

Affected versions:
Spring gRPC: 1.0.0 - 1.0.2 (fixed in 1.0.3). Older, unsupported versions are also affected.

## Affected Products

- Spring — Spring gRPC (1.0.0)

## References

- [CNA](https://spring.io/security/cve-2026-40968)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.17%
- **EPSS Percentile:** 6.7

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._