HIGH 7.8 GitHub
CVE-2026-12958
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
Affected Products
- npm/@aws/lsp-codewhisperer < 0.0.117
References
- https://github.com/advisories/GHSA-6v3r-4p5c-mrp5
- https://github.com/aws/language-servers/security/advisories/GHSA-6v3r-4p5c-mrp5
- https://nvd.nist.gov/vuln/detail/CVE-2026-12958
- https://github.com/Amazon-Q-Developer/language-servers/pull/2742
This high severity vulnerability with a CVSS score of 7.8 was published on 2026-09-24 via GitHub. Affected: npm/@aws/lsp-codewhisperer < 0.0.117.
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