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VULNERABILITIES

CVE-2026-33167 Details

Description

Action Pack is a Rubygem for building web applications on the Rails framework. In versions on the 8.1 branch prior to 8.1.2.1, the debug exceptions page does not properly escape exception messages. A carefully crafted exception message could inject arbitrary HTML and JavaScript into the page, leading to XSS. This affects applications with detailed exception pages enabled (`config.consider_all_requests_local = true`), which is the default in development. Version 8.1.2.1 contains a patch.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:6.1 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/rails/rails/commit/6752711c8c31d79ba50d13af6a6698a3b85415e0 [email protected]Patch
https://github.com/rails/rails/releases/tag/v8.1.2.1 [email protected]Release Notes
https://github.com/rails/rails/security/advisories/GHSA-pgm4-439c-5jp6 [email protected]Vendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')[email protected]

Affected Products

ProductVersions
rubyonrails rails
>= 8.1.0, < 8.1.2.1

CPE

  • cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

4 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-33167
NVD Published Date:
Mar 23, 2026
NVD Last Modified:
Aug 12, 2026
Source:
[email protected]
CVE-2026-33167 Details - Not Deferred