CVE-2026-34060

CriticalCVSS 9.8/10Last modified Jun 17, 2026

Description

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.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-94

Affected software

Vendor	Product	Versions
Shopify	ruby-lsp	< 0.26.9
Shopify	Shopify.ruby-lsp	< 0.10.2

References

https://github.com/Shopify/ruby-lsp/releases/tag/v0.26.9Release Notes
https://github.com/Shopify/ruby-lsp/security/advisories/GHSA-c4r5-fxqw-vh93Mitigation, Vendor Advisory

Timeline

Published: Mar 31, 2026
Last modified: Jun 17, 2026
NVD status: Analyzed

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