TI-2026-18352 Aliases CVE-2026-22860 GHSA-mxw3-3hh2-x2mh

Rack has a Directory Traversal via Rack:Directory

MEDIUM 40CWE-22Published 2026-02-18 · Updated 2026-07-15

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Information disclosure
Confidentiality · integrity · availability: High · None · None
Fix status: Partial Red Hat: 1 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-22 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00763 55th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Partial rack (rack): 2.2.22, 3.1.20, 3.2.5rack (RubyGems): 2.2.22, 3.1.20, 3.2.5Red Hat: 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
rack	rack	before 2.2.22; 3.0.0.beta1 to before 3.1.20; 3.2.0 to before 3.2.5	2.2.22, 3.1.20, 3.2.5	Patch available	CNA
—	rack (RubyGems)	before 2.2.22	2.2.22	Patch available	GHSA-mxw3-3hh2-x2mh
—	rack (RubyGems)	3.0.0.beta1 to before 3.1.20	3.1.20	Patch available	GHSA-mxw3-3hh2-x2mh
—	rack (RubyGems)	3.2.0 to before 3.2.5	3.2.5	Patch available	GHSA-mxw3-3hh2-x2mh

rack Vendorrack Affected before 2.2.22; 3.0.0.beta1 to before 3.1.20; 3.2.0 to before 3.2.5 Fixed in 2.2.22, 3.1.20, 3.2.5 Patch available CNA
rack (RubyGems) Vendor— Affected before 2.2.22 Fixed in 2.2.22 Patch available GHSA-mxw3-3hh2-x2mh
rack (RubyGems) Vendor— Affected 3.0.0.beta1 to before 3.1.20 Fixed in 3.1.20 Patch available GHSA-mxw3-3hh2-x2mh
rack (RubyGems) Vendor— Affected 3.2.0 to before 3.2.5 Fixed in 3.2.5 Patch available GHSA-mxw3-3hh2-x2mh

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:rack:rack::::::ruby::*	before 2.2.22; 3.0.0 to before 3.1.20; 3.2.0 to before 3.2.5	Vulnerable	rack

cpe:2.3:a:rack:rack:*:*:*:*:*:ruby:*:* Versions before 2.2.22; 3.0.0 to before 3.1.20; 3.2.0 to before 3.2.5 Vulnerable ·rack

Remediation

Fix · CNA rack (rack) Fixed in 2.2.22, 3.1.20, 3.2.5
Fix · GHSA-mxw3-3hh2-x2mh rack (RubyGems) Fixed in 2.2.22 Advisory →
Fix · GHSA-mxw3-3hh2-x2mh rack (RubyGems) Fixed in 3.1.20 Advisory →
Fix · GHSA-mxw3-3hh2-x2mh rack (RubyGems) Fixed in 3.2.5 Advisory →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat 3scale API Management Platform 2	Affected	No fix yet

Not affected: 5 products

Logging Subsystem for Red Hat OpenShift
Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9

Timeline

2026-10-02 Threatist record created from CVE-2026-22860
2026-10-03 Alias added: GHSA-mxw3-3hh2-x2mh

References

Other 2

TI-2024-16580 Rack ReDos in content type parsing (2nd degree polynomial) CVSS 3.1HIGH 7.5
TI-2024-17236 Possible Denial of Service Vulnerability in Rack Header Parsing CVSS 3.1HIGH 7.5
TI-2024-17231 Possible DoS Vulnerability with Range Header in Rack CVSS 3.1HIGH 7.5
TI-2023-12254 Uncontrolled resource consumption in https://github.com/rack/rack CVSS 3.1HIGH 7.5
TI-2025-38165 Rack's multipart parser buffers unbounded per-part headers, enabling DoS (memory exhaustion) CVSS 3.1HIGH 7.5
TI-2025-38163 Rack's unbounded multipart preamble buffering enables DoS (memory exhaustion) CVSS 3.1HIGH 7.5

See all 36 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences