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Vulnerability DatabaseCVE-2026-33167

CVE-2026-33167: 
Ruby vulnerability analysis and mitigation

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.

Source: NVD

Related Ruby vulnerabilities:

CVE ID

Severity

Score

Technologies

Component name

CISA KEV exploit

Has fix

Published date

GHSA-2x79-gwq3-vxxmHIGH8.7
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NoNoApr 14, 2026
GHSA-ghmh-q25g-gxxxHIGH7.5
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CVE-2026-40870HIGH7.5
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GHSA-w5xj-99cg-rccmHIGH7.5
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CVE-2026-40869HIGH7.5
  • RubyRuby
  • decidim-core
NoYesApr 14, 2026

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