CVE-2026-120639

Name	CVE-2026-120639
Description	CGI versions before 5.00 for Perl allow HTTP header injection via entity decoding after the newline check in header and unchecked values in multipart_start and do_push. With autoEscape off, header decodes HTML entities in extra header values after its newline check, so an encoded CR or LF reaches the response. multipart_start does not check header values for newlines, and do_push does not check the type it prints in each part. An application that passes request data into these header values can be made to add headers or split the response.
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/44874826/
https://github.com/leejo/CGI.pm/commit/69955309d371c8093d11cf12e3ddef491537ffad (v5.01)
https://github.com/leejo/CGI.pm/commit/7733c2753f4f240012097507cda2b6e87ae46db4 (v5.01)