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CVE-2026-22860

Rack path traversal

7.5 HIGHPublic exploitEPSS 0.68%
  1. Published18 Feb 2026

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

Rack≥ 3.0.0 < 3.1.20 · ≥ 3.2.0 < 3.2.5 · < 2.2.22

Remediation

Fixed in
Rack≥ 3.1.20

References

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Frequently asked

Is CVE-2026-22860 being actively exploited?

CVE-2026-22860 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.68%.

How severe is CVE-2026-22860?

CVE-2026-22860 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 0.68% probability of exploitation.

Which products are affected by CVE-2026-22860?

Affected products include Rack.

How do I fix CVE-2026-22860?

Upgrade affected software to a fixed version, for example Rack 3.1.20 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.