GHSA-xhcr-j4j9-3gh7

Source

https://github.com/advisories/GHSA-xhcr-j4j9-3gh7

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/09/GHSA-xhcr-j4j9-3gh7/GHSA-xhcr-j4j9-3gh7.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-xhcr-j4j9-3gh7

Aliases

CVE-2026-12957

Published

2026-09-24T19:13:53Z

Modified

2026-09-24T19:30:05Z

Severity

8.5 (High) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVSS Calculator

Summary

Language Servers for AWS Vulnerable to Arbitrary Code Execution

Details

Summary

Language Servers for AWS (the aws/language-servers project) provide the underlying language-server runtime that powers Amazon Q Developer's AI coding assistance across its IDE plugins (Visual Studio Code, JetBrains, Eclipse, and Visual Studio).

Improper trust boundary enforcement in Language Servers for AWS may allow for arbitrary code execution. If a local user opens a maliciously crafted workspace, any commands within the project configuration files may be automatically executed.

Impact

When a local user opens a maliciously crafted workspace and trusts it when prompted, commands defined in the workspace's project-level configuration files may be executed automatically, resulting in arbitrary code execution on the user's host.

This issue is triggered when a user opens a workspace, trusts it, and the agent subsequently executes commands defined in the project-level configuration files.

Impacted versions: Language Servers for AWS version <1.65.0.

Patches

This issue has been addressed in Language Servers for AWS version 1.65.0. We recommend upgrading to the latest version and ensuring any forked or derivative code is patched to incorporate the new fixes.

Workarounds

No workarounds are available.

References

If you have any questions or comments about this advisory, AWS Security asks that you contact them via their vulnerability reporting page or directly via email to aws-security@amazon.com. Please do not create a public GitHub issue.

Acknowledgement

AWS Security would like to thank Wiz and Maor Dokhanian for collaborating on this issue through the coordinated vulnerability disclosure process.

Database specific

{
    "cwe_ids":  [
        "CWE-732"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-09-24T19:13:53Z",
    "nvd_published_at":  "2026-06-23T17:16:40Z",
    "severity":  "HIGH"
}

References

Affected packages

npm / @aws/lsp-codewhisperer

Package

Name: @aws/lsp-codewhisperer; View open source insights on deps.dev
Purl: pkg:npm/%40aws/lsp-codewhisperer

Affected ranges

Type: SEMVER
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

0.0.113

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/09/GHSA-xhcr-j4j9-3gh7/GHSA-xhcr-j4j9-3gh7.json"