CVE-2026-120638

Name	CVE-2026-120638
Description	CGI versions before 5.00 for Perl allow open redirects via HTML entity decoding of the URL after application validation in redirect. redirect decodes HTML entities in its URL before writing the Location header, so a URL the application has already validated can change meaning. For example, //evil.example/ becomes //evil.example/ and sends the user to another host.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
libcgi-pm-perl (PTS)	bookworm	4.55-1	vulnerable
	trixie	4.68-1	vulnerable
	forky	4.72-1	vulnerable
	sid	5.02-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
libcgi-pm-perl	source	(unstable)	5.02-1

Notes

https://lists.security.metacpan.org/cve-announce/msg/44874824/
https://github.com/leejo/CGI.pm/commit/7733c2753f4f240012097507cda2b6e87ae46db4 (v5.01)