AIKIDO-2026-433182
rubygems-update is vulnerable to Improper Input Validation
58
Medium Risk
This Affects:
rubygems-updateTL;DR
rubygems' gem installer was vulnerable to malicious executable/bin names being embedded into generated Ruby wrapper code, enabling Ruby code injection (leading to RCE) and also to bindir/executable path manipulation via insufficient validation. The patch escapes embedded filename characters and adds strict validation that bindir stays within the gem directory and executables are safe basenames. Bundler also includes a fix for cooldown filtering that could break dependency resolution (DoS), plus improved terminal/control-character sanitization.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range.
Background info
rubygems-update is vulnerable to Improper Input Validation in versions 2.2.0 - 4.0.13.
How to fix this
Upgrade the rubygems-update library to the patch version.
Are You Affected?
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SOC 2Compliant
ISO 27001Compliant