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    <link>https://vulnerability.circl.lu</link>
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      <title>CVE-2021-22904</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2021-22904</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; https://github.com/rails/rails&lt;/p&gt;
&lt;p&gt;The actionpack ruby gem before 6.1.3.2, 6.0.3.7, 5.2.4.6, 5.2.6 suffers from a possible denial of service vulnerability in the Token Authentication logic in Action Controller due to a too permissive regular expression. Impacted code uses `authenticate_or_request_with_http_token` or `authenticate_with_http_token` for request authentication.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; https://github.com/rails/rails&lt;/p&gt;
&lt;p&gt;The actionpack ruby gem before 6.1.3.2, 6.0.3.7, 5.2.4.6, 5.2.6 suffers from a possible denial of service vulnerability in the Token Authentication logic in Action Controller due to a too permissive regular expression. Impacted code uses `authenticate_or_request_with_http_token` or `authenticate_with_http_token` for request authentication.&lt;/p&gt;</content:encoded>
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