GitHub Advisoryadvisory · Maven

GHSA-4g9c-3x4p-mfpp Spring gRPC SecurityContext leaks across requests upon authorization failure

MEDIUM Published 2026-04-28 Modified 2026-05-06 Official page ↗
Aliases
CVE-2026-40968
Ecosystem
Maven
Packages
org.springframework.grpc:spring-grpc
Severity
Moderate
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
Weaknesses
CWE-653
Reviewed
2026-05-06

Affected packages

• Maven org.springframework.grpc:spring-grpc: < 1.0.3 → fixed in 1.0.3

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.

Related

Alias · CVE (1)

  • CVE-2026-40968 When an authenticated user is denied access to a gRPC method, their authenticated identity remains bound to the gRPC worker thread and can… vulnerability

Weakness · CWE (1)

  • CWE-653 Improper Isolation or Compartmentalization weakness

References