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CVE-2026-101916— @grpc/grpc-js: In certain configurations, getAuthContext can return unauthorized certificates as though they were authorized

Quick assessment

Affected
grpc grpc-node
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

@grpc/grpc-js 是一个纯粹用 JavaScript 实现、不依赖 C++ 附加组件的 gRPC 核心功能库。在版本 1.13.6 及 1.14.5 之前，当服务器证书设置中 为 false 时， 方法无法正确区分已认证和未认证的客户端证书。如果应用程序使用该方法返回的身份认证上下文，可能会将未认证的证书误认为已认证，从而导致身份验证逻辑失效。 在受影响的配置中启用 RBAC（基于角色的访问控制）认证时，@grpc/grpc-js-xds 也会受到此问题的影响。该问题已在版本 1.14.5 和 1.13.

CVSS 7.4 · High

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts
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I. Basic Information for CVE-2026-101916

Vulnerability Information
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Vulnerability Title
@grpc/grpc-js: In certain configurations, getAuthContext can return unauthorized certificates as though they were authorized
Source: CVE Program / CVE List V5
Vulnerability Description
@grpc/grpc-js implements the core functionality of gRPC purely in JavaScript, without a C++ addon. Prior to 1.13.6 and 1.14.5, getAuthContext does not distinguish authorized from unauthorized peer certificates when server credentials set requireClientCertificate to false. When applications use the returned authentication context, they can treat an unauthorized certificate as authorized, causing improper authentication. @grpc/grpc-js-xds can reach this condition when RBAC authentication is enabled in affected configurations. This issue is fixed in version 1.14.5 and 1.13.6.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
证书验证不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
grpc grpc-node < 1.13.6 -

II. Public POCs for CVE-2026-101916

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III. Intelligence Information for CVE-2026-101916

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Vendor Pages for CVE-2026-101916 (1)

Other References for CVE-2026-101916 (3)

Same Patch Batch · grpc · 2026-09-28 · 3 CVEs total

CVE-2026-101914 6.5 MEDIUM @grpc/grpc-js: The exact path match matcher incorrectly only applies a prefix match for ca
CVE-2026-101915 3.7 LOW @grpc/grpc-js: The server transmits some error messages thrown by method handlers to the c

IV. Related Vulnerabilities

Same product: grpc-node
Same vendor: grpc
Same weakness: CWE-295

V. Comments for CVE-2026-101916

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