Arbitrary Code Injection Affecting ruby-lsp package, versions <0.26.9
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published29 Mar 2026
- disclosed27 Mar 2026
- creditUnknown
Introduced: 27 Mar 2026
NewCVE-2026-34060 (opens in a new tab)How to fix?
Upgrade ruby-lsp to version 0.26.9 or higher.
Overview
Affected versions of this package are vulnerable to Arbitrary Code Injection via unsanitized interpolation of the branch setting in the Gemfile generation process. An attacker can execute arbitrary Ruby code by crafting a malicious .vscode/settings.json or equivalent workspace configuration that is automatically applied when the editor opens and the workspace is trusted. This is only exploitable if the user opens and trusts a workspace containing a malicious configuration file.