CVE-2026-34060

Ruby LSP is an implementation of the language server protocol for Ruby. Prior to Shopify.ruby-lsp version 0.10.2 and ruby-lsp version 0.26.9, the rubyLsp.branch VS Code workspace setting was interpolated without sanitization into a generated Gemfile, allowing arbitrary Ruby code execution when a user opens a project containing a malicious .vscode/settings.json. This issue has been patched in Shopify.ruby-lsp version 0.10.2 and ruby-lsp version 0.26.9.

Score

CVSS 3.1 9.8 Critical

Status

Analyzed - security-advisories@github.com

Published

2026-03-31

Last modified

2026-04-02

Weaknesses

CWE-94

Affected products

• Ruby-lsp (Shopify)
• Ruby Lsp (Shopify)
• Shopify.ruby-lsp (Shopify)

References

• https://github.com/Shopify/ruby-lsp/releases/tag/v0.26.9
• https://github.com/Shopify/ruby-lsp/security/advisories/GHSA-c4r5-fxqw-vh93