Microsoft Security Response Center guidance
Vendor revision: Nov 7, 2026Release Notes
Vulnerability intelligence
CVE-2026-120644. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.
Release Notes
CGI::Cookie versions before 5.00 for Perl allow cookie attribute injection via unvalidated path, domain and expires values.
The path, domain and expires values are written into the Set-Cookie header without checking for semicolons or control characters.
An application that sets them from request data can be made to add other cookie attributes, such as Domain or SameSite.
Source: NVD