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High severityNVD Advisory· Published Feb 18, 2026· Updated Feb 18, 2026

Rack has a Directory Traversal via Rack:Directory

CVE-2026-22860

Description

Rack is a modular Ruby web server interface. Prior to versions 2.2.22, 3.1.20, and 3.2.5, Rack::Directory’s path check used a string prefix match on the expanded path. A request like /../root_example/ can escape the configured root if the target path starts with the root string, allowing directory listing outside the intended root. Versions 2.2.22, 3.1.20, and 3.2.5 fix the issue.

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Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
rackRubyGems
< 2.2.222.2.22
rackRubyGems
>= 3.0.0.beta1, < 3.1.203.1.20
rackRubyGems
>= 3.2.0, < 3.2.53.2.5

Affected products

73

Patches

Vulnerability mechanics

References

5

News mentions

0

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