AIKIDO-2026-626625
kas is vulnerable to Improper Certificate Validation
33
Low Risk
This Affects:
kasTL;DR
kas can set up SSH access for its internal git operations when triggered through environment variables. When no user SSH configuration exists, it writes a ~/.ssh/config that disables StrictHostKeyChecking, and this setting persists after kas finishes running. As a result, later SSH connections made by the same user skip host authenticity verification and become exposed to man-in-the-middle attacks. The fix limits disabling host key checking to CI environments.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and you rely on kas internal SSH key setup via environment variables on a system without an existing ~/.ssh/config.
Background info
kas is vulnerable to Improper Certificate Validation in versions 0.0.1 - 5.3.0.
How to fix this
Upgrade the kas library to the patch version.
Links
GitHub Release
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