CVE-2026-22860 | Rack has a Directory Traversal via Rack:Directory

Exp

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.

Published: 2026-02-18 Last update: 2026-02-19 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-22860 is rated Exploit Available (50.6/100): CVSS High severity, with low exploitation likelihood (EPSS 0.05%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2026-22860

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2026-22860

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-02-20 0.04% 0.05% +0.01%
2 2026-02-19 — 0.04% —

Full EPSS history (2 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-22860

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 [email protected]

Weakness enumeration for CVE-2026-22860

GitHub Security Advisory for CVE-2026-22860

GHSA-mxw3-3hh2-x2mh · Severity: high · Ecosystem: rubygems — Rack has a Directory Traversal via Rack:Directory

OS Trackers for CVE-2026-22860

vendor priority summary link
debian not yet assigned CVE-2026-22860 not yet assigned priority: Debian including 1 source packages (ruby-rack), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2026-22860
redhat high — https://access.redhat.com/security/cve/CVE-2026-22860
suse high CVE-2026-22860 severity important: SUSE including 9 source package names (hawk2, rmt-server, …), 45 product×package rows across 23 product lines (SUSE Linux Enterprise High Availability Extension 12 SP5, SUSE Linux Enterprise High Availability Extension 15 SP4, … (23 product lines)): Known Not Affected 44, Fixed 1. https://www.suse.com/security/cve/CVE-2026-22860/
ubuntu medium CVE-2026-22860 medium priority: Ubuntu including 1 source packages (ruby-rack), 8 status rows across 8 suites (bionic, focal, jammy, noble, questing, trusty, upstream, xenial): released 5, ignored 3. https://ubuntu.com/security/CVE-2026-22860

Affected software / configurations for CVE-2026-22860

Vendor Product Version Raw CPE
rack rack < 2.2.22 cpe:2.3:a:rack:rack:*:*:*:*:*:ruby:*:*
rack rack >= 3.0.0, < 3.1.20 cpe:2.3:a:rack:rack:*:*:*:*:*:ruby:*:*
rack rack >= 3.2.0, < 3.2.5 cpe:2.3:a:rack:rack:*:*:*:*:*:ruby:*:*

References for CVE-2026-22860

cvelogic Threat Intelligence