CVE-2026-34060

CRITICAL

9.8

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.

CVE Details

CVSS v3.1 Score9.8

SeverityCRITICAL

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published3/31/2026

Last Modified4/2/2026

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

CWE-94

References

https://github.com/Shopify/ruby-lsp/releases/tag/v0.26.9(security-advisories@github.com)

https://github.com/Shopify/ruby-lsp/security/advisories/GHSA-c4r5-fxqw-vh93(security-advisories@github.com)

IOC Correlations

No correlations recorded

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