Summaryinfo

A vulnerability was found in Shopify ruby-lsp up to 0.26.8. It has been declared as critical. Impacted is an unknown function of the file vscode/settings.json. Executing a manipulation can lead to code injection. The identification of this vulnerability is CVE-2026-34060. The attack can only be executed locally. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Shopify ruby-lsp up to 0.26.8. This vulnerability affects some unknown processing of the file vscode/settings.json. The manipulation with an unknown input leads to a code injection vulnerability. The CWE definition for the vulnerability is CWE-94. The product 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. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-34060 since 03/25/2026. The exploitation appears to be easy. The attack needs to be approached locally. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1059.

By approaching the search of inurl:vscode/settings.json it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 0.26.9 eliminates this vulnerability. The upgrade is hosted for download at github.com.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Programming Language Software

Vendor

• Shopify

Name

• ruby-lsp

Version

• 0.26.0
• 0.26.1
• 0.26.2
• 0.26.3
• 0.26.4
• 0.26.5
• 0.26.6
• 0.26.7
• 0.26.8

Website

• Product: https://github.com/Shopify/ruby-lsp/

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Discussion