CVE-2026-25500
Rack's Stored XSS in Rack::Directory via javascript: filenames rendered into anchor href
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.
INFO
Published Date :
Feb. 18, 2026, 8:18 p.m.
Last Modified :
Feb. 19, 2026, 6:26 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | MITRE-CVE |
Solution
- Update Rack to version 2.2.22 or later.
- Update Rack to version 3.1.20 or later.
- Update Rack to version 3.2.5 or later.
Public PoC/Exploit Available at Github
CVE-2026-25500 has a 2 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-25500.
| URL | Resource |
|---|---|
| https://github.com/rack/rack/commit/f2f225f297b99fbee3d9f51255d41f601fc40aff | Patch |
| https://github.com/rack/rack/security/advisories/GHSA-whrj-4476-wvmp | Exploit Mitigation Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-25500 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-25500
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
# مستودع asrar-mared هذا هو المستودع الرئيسي لمجموعة **المارد الرقمي**، نقطة التحكم المركزية التي تجمع كل المشاريع والميول التقنية تحت راية واحدة. يمثل الأساس الذي تُبنى عليه الفروع الأخرى، ويُدار منه كل شيء من تنظيم الكود إلى إدارة المجتمع. للاطلاع على المستودع: [asrar-mared](https://github.com/asrar-mared)
HTML CSS
None
Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-25500 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-25500 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Feb. 19, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:rack:rack:*:*:*:*:*:ruby:*:* versions up to (excluding) 2.2.22 *cpe:2.3:a:rack:rack:*:*:*:*:*:ruby:*:* versions from (including) 3.0.0 up to (excluding) 3.1.20 *cpe:2.3:a:rack:rack:*:*:*:*:*:ruby:*:* versions from (including) 3.2.0 up to (excluding) 3.2.5 Added Reference Type GitHub, Inc.: https://github.com/rack/rack/commit/f2f225f297b99fbee3d9f51255d41f601fc40aff Types: Patch Added Reference Type GitHub, Inc.: https://github.com/rack/rack/security/advisories/GHSA-whrj-4476-wvmp Types: Exploit, Mitigation, Vendor Advisory -
New CVE Received by [email protected]
Feb. 18, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Added CWE CWE-79 Added Reference https://github.com/rack/rack/commit/f2f225f297b99fbee3d9f51255d41f601fc40aff Added Reference https://github.com/rack/rack/security/advisories/GHSA-whrj-4476-wvmp