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GHSA-88h9-xgvx-hvf2

MediumCVSS 6.5 / 10
Published Sep 28, 2026·Last modified Sep 28, 2026
Affected Components(2)
npm logo@grpc/grpc-js-xds
1.14.0 – 1.14.1
npm logo@grpc/grpc-js-xds
< 1.13.1
Description

Impact

When using RBAC to apply authentication rules, the exact path (method name) matcher applies a prefix match instead of an exact match for case-insensitive matches. As a result, if a service has a method with a name that is a prefix of the name of a different method, and they have different access rules, and case-insensitive matching is used, this bug can cause improper authentication.

Patches

This vulnerability is fixed in 1.13.1 and 1.14.1.

Workarounds

This problem can be avoided by enabling case-sensitive path matching.

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Risk Scores
Base Score
6.5

The vulnerability can be exploited over the network without needing physical access. It is difficult for an attacker to exploit this vulnerability and may require special conditions. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a low impact on the confidentiality of the information. There is a high impact on the integrity of the data.

Threat Intelligence
6.0

Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.

EPSS
0.25%

The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

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