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CVE-2026-101914— @grpc/grpc-js: The exact path match matcher incorrectly only applies a prefix match for case-insensitive matches

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 JavaScript 实现的 gRPC 核心功能库，无需依赖 C++ 扩展。在版本 1.13.1 和 1.14.1 之前，当启用不区分大小写的匹配模式时，RBAC（基于角色的访问控制）使用的路径（方法名）匹配器采用前缀匹配而非精确相等匹配。如果某个服务的方法名是另一个方法名的前缀，且这两个方法配置了不同的访问权限规则，那么针对较长方法名的请求可能会错误地匹配到较短方法名的访问规则，从而导致授权判断错误。该问题已在版本 1.13.1 和 1.14.1 中得到修复。

CVSS 6.5 · Medium

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts
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I. Basic Information for CVE-2026-101914

Vulnerability Information
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Vulnerability Title
@grpc/grpc-js: The exact path match matcher incorrectly only applies a prefix match for case-insensitive matches
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 1.13.1 and 1.14.1, the exact path (method name) matcher used by RBAC performs a prefix comparison instead of an equality comparison when case-insensitive matching is enabled. If one service method name prefixes another and the methods have different access rules, a request for the longer method can match the shorter method's rule and cause incorrect authorization. This issue is fixed in versions 1.13.1 and 1.14.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
部分比较
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
grpc grpc-node < 1.13.1 -

II. Public POCs for CVE-2026-101914

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III. Intelligence Information for CVE-2026-101914

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Patches & Fixes for CVE-2026-101914 (4)

Vendor Advisories for CVE-2026-101914 (1)

Other References for CVE-2026-101914 (1)

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

CVE-2026-101916 7.4 HIGH @grpc/grpc-js: In certain configurations, getAuthContext can return unauthorized certifica
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-187

V. Comments for CVE-2026-101914

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