UBUNTU-CVE-2026-120639
Dashboard / Vulnerabilities / UBUNTU-CVE-2026-120639
Summary:
Details: 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.
References: https://ubuntu.com/security/CVE-2026-120639, https://www.cve.org/CVERecord?id=CVE-2026-120639, https://lists.security.metacpan.org/cve-announce/msg/44874826/, https://github.com/leejo/CGI.pm/commit/69955309d371c8093d11cf12e3ddef491537ffad, https://github.com/leejo/CGI.pm/commit/7733c2753f4f240012097507cda2b6e87ae46db4, https://github.com/leejo/CGI.pm/commit/69955309d371c8093d11cf12e3ddef491537ffad.patch, https://github.com/leejo/CGI.pm/commit/7733c2753f4f240012097507cda2b6e87ae46db4.patch, https://metacpan.org/release/LEEJO/CGI-4.72/source/lib/CGI.pm, https://metacpan.org/release/LEEJO/CGI-5.00/changes
Affected packages
Package
Name: libcgi-pm-perl
Purl: pkg:deb/ubuntu/libcgi-pm-perl?arch=source&distro=xenial
Affected ranges
Type: ECOSYSTEM
Events:
