Is CVE-2026-25500 actively exploited?

CVE-2026-25500 has no public evidence of in-the-wild exploitation as of 2026-02-19.

What is the CVSS score for CVE-2026-25500?

CVE-2026-25500 has a CVSS score of 5.4 (MEDIUM severity). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

How do I patch CVE-2026-25500?

Patch guidance is available from rack security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2026-25500.

Which products are affected by CVE-2026-25500?

3 products: rack rack, rack rack, rack rack.

CVE-2026-25500 - remediation guidance & executive summary

Description

Rack is a modular Ruby web server interface. Prior to versions 2.2.22, 3.1.20, and 3.2.5, `Rack::Directory` generates an HTML directory index where each file entry is rendered as a clickable link. If a file exists on disk whose basename starts with the `javascript:` scheme (e.g. `javascript:alert(1)`), the generated index contains an anchor whose `href` is exactly `javascript:alert(1)`. Clicking the entry executes JavaScript in the browser (demonstrated with `alert(1)`). Versions 2.2.22, 3.1.20, and 3.2.5 fix the issue.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Attack Vector: network
Complexity: low
Privileges: low
User Action: required
Scope: changed
Confidentiality: low
Integrity: low
Availability: none
Weaknesses: CWE-79 · Cross-site Scripting (XSS)

Metadata

Primary Vendor: RACK
Published: 2/18/2026
Last Modified: 2/19/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

rack : rackrack : rackrack : rack

Remediation Guidance

Executive Summary

Cite this page

CVE-2026-25500. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2026-25500

View on NIST NVD

CVE-2026-25500 vulnerability