CVE-2026-34060

EUVD-2026-17282

31.03.2026, 03:15

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.

Code Injection

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	Primary	9.8 CRITICAL	NETWORK	LOW	NONE	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Base Score

CVSS 3.x

EPSS Score

Percentile: 39.09%

Affected Products (NVD)

Vendor	Product	Version
shopify	ruby_lsp	𝑥 < 0.10.2
shopify	ruby_lsp	𝑥 < 0.26.9

𝑥

= Vulnerable software versions

Debian Releases

Debian Product

Codename

ruby-ruby-lsp

forky	0.26.9-0.1 fixed
sid	0.26.9-0.1 fixed

Ubuntu Releases

Ubuntu Product

Codename

ruby-ruby-lsp

jammy	dne
noble	dne
questing	dne
resolute	dne

Common Weakness Enumeration

CWE-94 - Improper Control of Generation of Code ('Code Injection')
The software constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.

References

https://github.com/Shopify/ruby-lsp/releases/tag/v0.26.9

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