CVE-2026-40968— Spring gRPC SecurityContext leaks across requests on authorization failure
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I. Basic Information for CVE-2026-40968
Vulnerability Information
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Vulnerability Title
Spring gRPC SecurityContext leaks across requests on authorization failure
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
不充分的划分
Source: NVD (National Vulnerability Database)
Vulnerability Title
Vmware Spring gRPC 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Vmware Spring gRPC是美国威睿（Vmware）公司的一个支持gRPC通信的Spring应用开发扩展组件。 Vmware Spring gRPC 1.0.0至1.0.2版本存在安全漏洞，该漏洞源于认证用户被拒绝访问gRPC方法时，其认证身份仍绑定到gRPC工作线程，可能被后续同一线程上的未认证请求继承，导致权限提升。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Spring | Spring gRPC | 1.0.0 ~ 1.0.3 | - |
II. Public POCs for CVE-2026-40968
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · Spring · 2026-04-28 · 6 CVEs total
| CVE-2026-40978 | 8.8 HIGH | VMware Spring AI SQL注入漏洞 |
| CVE-2026-40967 | 8.6 HIGH | VMware Spring AI 代码注入漏洞 |
| CVE-2026-40980 | 6.5 MEDIUM | VMware Spring AI 资源管理错误漏洞 |
| CVE-2026-40979 | 6.1 MEDIUM | VMware Spring AI 安全漏洞 |
| CVE-2026-40969 | 3.7 LOW | Spring gRPC AuthenticationException message reflected to remote client |
IV. Related Vulnerabilities
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Keycloak: keycloak: privilege escalation via forged authoriz
V. Comments for CVE-2026-40968
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