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.
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.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
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| unaffected |
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Project Subscriptions
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Advisories
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Fixes
Solution
Upgrade to CGI 5.00 or later.
Workaround
No workaround given by the vendor.
References
History
Wed, 04 Nov 2026 00:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | CGI versions before 5.00 for Perl allow open redirects and script injection via URLs built from REQUEST_URI in url and start_form | |
| Weaknesses | CWE-601 CWE-79 |
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| References |
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Projects
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MITRE
Status: PUBLISHED
Assigner: CPANSec
Published:
Updated: 2026-11-03T23:40:18.085Z
Reserved: 2026-11-02T17:40:32.876Z
Link: CVE-2026-120636
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-11-04T00:17:24.867
Modified: 2026-11-04T00:17:24.867
Link: CVE-2026-120636
Redhat
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OpenCVE Enrichment
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