Language Servers for AWS vulnerable to arbitrary file write

## Summary Language Servers for AWS (the aws/language-servers project) provides the Language Server Protocol implementations that power AWS developer tooling, including the Amazon Q Developer agentic chat experience, across IDEs such as VS Code, JetBrains, Visual Studio, and Eclipse. Missing symlink validation in Language Servers for AWS may allow an arbitrary file write outside of the workspace trust boundary. This may occur when a local user opens a workspace containing a maliciously crafted symlink that resolves to a file path outside the workspace trust boundary. ## Impact If a user opens a maliciously crafted workspace containing a symlink that resides within the workspace but resolves to a location outside the workspace trust boundary, the agent may follow that symlink and write to the external location without prompting the user for approval. This can result in the modification of files outside the intended workspace boundary. This issue is triggered when a user opens a workspace, trusts it, and the agent subsequently writes to a path within that workspace. Impacted versions: Language Servers for AWS version <1.69.0. ## Patches This issue has been addressed in AWS Language Servers version 1.69.0. 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 ask that you contact them via their [vulnerability reporting page](https://aws.amazon.com/security/vulnerability-reporting) or directly via email to [[email protected]](mailto:[email protected]). 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.

Source published

24 Sep 2026 19:15:39 UTC

Source modified

24 Sep 2026 19:30:05 UTC

Observed here

24 Oct 2026 13:17:17 UTC

Source terms

GitHub Advisory Database · CC-BY-4.0

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · GitHub Advisory Database · CC-BY-4.0. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS_V3 · CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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

Publisher rating · HIGH