CVE-2026-34060: Shopify Ruby Lsp

Critical severity, CVSS 9.8. EPSS: 0.6% chance of exploitation in the next 30 days.

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.

Affected products

• Shopify Ruby Lsp: before 0.10.2 (fixed in 0.10.2); before 0.26.9 (fixed in 0.26.9)

Published 2026-03-31. Last modified 2026-06-17.