CVE-2026-101915: @grpc/grpc-js: The server transmits some error messages thrown by method handlers to the client in status messages
@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, when an application method handler throws an uncaught error, the server includes its error message in the status message sent to the client. The thrown error message is transmitted to the client, causing sensitive information disclosure when the message contains sensitive data. This issue is fixed in versions 1.13.6 and 1.14.5.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
@grpc/grpc-jsto a version that resolves this vulnerability.Fixed in 1.13.6 - Upgrade
Upgrade
@grpc/grpc-jsto a version that resolves this vulnerability.Fixed in 1.14.5
Event History
Frequently Asked Questions
Which deployments are exposed to information disclosure?
Deployments using @grpc/grpc-js versions earlier than 1.13.6 or 1.14.5 are affected when an application method handler throws an uncaught error whose message contains sensitive data.
Does an attacker need authentication or user interaction to obtain the error message?
No authentication or user interaction is required according to the provided vector. Exploitation requires reaching a handler invocation that results in an uncaught error, and the attack complexity is rated high.
What versions remediate the issue?
The issue is fixed in @grpc/grpc-js versions 1.13.6 and 1.14.5. Upgrade to an applicable fixed version.