CVE-2026-34060

Ruby LSP has arbitrary code execution through branch setting

CVSS 7.1 HIGHEPSS 0.5%CWE-94

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 7.1EPSS 0.5%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

31 Mar 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Affected products

Shopify · ruby-lsp Shopify · Shopify.ruby-lsp

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References

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