CVE-2026-101915 @grpc/grpc-js: The server transmits some error messages thrown by method handlers to the client in status messages
Attackers can obtain sensitive information from error messages returned by gRPC server method handlers in the @grpc/grpc-js library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-101915?
CVE-2026-101915 is a low-severity vulnerability in grpc-node, published on 28 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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, 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.
Weakness: CWE-550
Which versions are affected by CVE-2026-101915?
4 open source packages ship an affected version, including @grpc/grpc-js.
| Package | Affected | Fixed in |
|---|---|---|
@grpc/grpc-js npm | All versions | 1.13.6 |
@grpc/grpc-js npm | All versions | 1.13.6 |
@grpc/grpc-js npm | From 1.14.0 | 1.14.5 |
@grpc/grpc-js npm | From 1.14.0 | 1.14.5 |
How do I fix CVE-2026-101915?
Upgrade @grpc/grpc-js to a fixed version for your release line: 1.13.6 or 1.14.5.
Is CVE-2026-101915 being exploited?
There is no known exploitation of CVE-2026-101915 in the wild and no public exploit code.
Sources
Also known as CLEANSTART-2026-AF37624, CLEANSTART-2026-DP81887, CLEANSTART-2026-VD98265, CLEANSTART-2026-ZH62940, ECHO-2e1d-24f0-0a19, GHSA-f596-whhp-79r4 and 15 more.