Rack up to 2.2.21/3.1.19/3.2.4 Rack::Directory path traversal

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability has been found in Rack up to 2.2.21/3.1.19/3.2.4 and classified as critical. This vulnerability affects the function Rack::Directory. This manipulation causes path traversal. This vulnerability is tracked as CVE-2026-22860. The attack is possible to be carried out remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability has been found in Rack up to 2.2.21/3.1.19/3.2.4 and classified as critical. Affected by this vulnerability is the function Rack::Directory. The manipulation with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. As an impact it is known to affect confidentiality. The summary by CVE is:

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.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-22860 since 01/12/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1006 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 299587 (Ruby Rack < 2.2.22 / 3.0.0.beta1 < 3.1.20 / 3.2.0 < 3.2.5 Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 2.2.22, 3.1.20 or 3.2.5 eliminates this vulnerability. Applying the patch 75c5745c286637a8f049a33790c71237762069e7 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (299587). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.5
CNA Vector (GitHub_M): 🔒

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Path traversal
CWE: CWE-22
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 299587
Nessus Name: Ruby Rack < 2.2.22 / 3.0.0.beta1 < 3.1.20 / 3.2.0 < 3.2.5 Multiple Vulnerabilities

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Rack 2.2.22/3.1.20/3.2.5
Patch: 75c5745c286637a8f049a33790c71237762069e7

Timelineinfo

01/12/2026 CVE reserved
02/18/2026 +37 days Advisory disclosed
02/18/2026 +0 days VulDB entry created
02/19/2026 +1 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-mxw3-3hh2-x2mh
Status: Confirmed

CVE: CVE-2026-22860 (🔒)
GCVE (CVE): GCVE-0-2026-22860
GCVE (VulDB): GCVE-100-346657

Entryinfo

Created: 02/18/2026 20:59
Updated: 02/19/2026 17:55
Changes: 02/18/2026 20:59 (66), 02/19/2026 17:55 (2)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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