CVE-2026-120648

Unknown

Description

CGI versions before 5.00 for Perl allow HTML injection via text containing --> in comment. Arguments are placed between  without escaping, so text containing --> closes the comment early. An application that passes request data to comment can be made to inject HTML into the page.

SeverityUnknown

CVSS—

Exploit probability—

ProductCgi

PublishedNov 4, 2026

First seenNov 4, 2026

Weakness typeCWE-79Cross-site scripting (XSS)

How to fix

Update

CGI5.00 or later

Patches

github.com/leejo/CGI.pm/commit/6a17eb84703d84bca86b0079f5870ca9c921ffd4.patch

Vendor advisories

metacpan.org/release/LEEJO/CGI-5.00/changes

Affected products

Product	Affected versions	Fixed in
CGI	v < 5.00	5.00

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