Bug 2566600 (CVE-2026-120636) - CVE-2026-120636 perl-cgi: perl-cgi: script injection via unvalidated request URI
Summary: CVE-2026-120636 perl-cgi: perl-cgi: script injection via unvalidated request URI
Keywords:
Status: NEW
Alias: CVE-2026-120636
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-11-03 23:51 UTC by OSIDB Bzimport
Modified: 2026-11-04 00:03 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
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Description OSIDB Bzimport 2026-11-03 23:51:50 UTC 
CGI versions before 5.00 for Perl allow open redirects and script injection via URLs built from REQUEST_URI in url and start_form.

url(-absolute=>1), url(-relative=>1) and the default start_form action are built from the client-supplied REQUEST_URI without validation. The result can be protocol-relative (//evil.example), absolute-form (http://evil.example/) or contain backslashes, and url(-relative=>1) can return a javascript: URL. Links and form posts built from these URLs can go to another host.
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