{"id":"UBUNTU-CVE-2026-120635","details":"CGI versions before 5.00 for Perl allow form fields to be smuggled past proxies and WAFs via multipart parsing that differs from the RFCs. The multipart/form-data parser matches the boundary anywhere rather than at the start of a line, uses the boundary without its leading -- for some client-supplied User-Agent values, finds the Content-Disposition name and filename inside the quoted values of other parameters, and corrupts parts when the boundary nears the 4096-byte read size.","modified":"2026-11-05T11:45:24.844301238Z","published":"2026-11-04T00:17:00Z","upstream":["CVE-2026-120635"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-120635"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-120635"},{"type":"REPORT","url":"https://lists.security.metacpan.org/cve-announce/msg/44874788/"},{"type":"REPORT","url":"https://github.com/leejo/CGI.pm/commit/f719fc08e8756708bcd4f1e357d5c0f8702f85dd"},{"type":"REPORT","url":"https://github.com/leejo/CGI.pm/commit/cbf04979f9974458ac223793bbd9d0b6a772aa66"},{"type":"REPORT","url":"https://github.com/leejo/CGI.pm/commit/fe9516804d59a3774e280c15dbb7072fbd0ba5f1"},{"type":"REPORT","url":"https://github.com/leejo/CGI.pm/commit/e0ef8f4248c6ae3025749040d8595d206b6a1b49"},{"type":"REPORT","url":"https://github.com/leejo/CGI.pm/commit/cbf04979f9974458ac223793bbd9d0b6a772aa66.patch"},{"type":"REPORT","url":"https://github.com/leejo/CGI.pm/commit/e0ef8f4248c6ae3025749040d8595d206b6a1b49.patch"},{"type":"REPORT","url":"https://github.com/leejo/CGI.pm/commit/f719fc08e8756708bcd4f1e357d5c0f8702f85dd.patch"},{"type":"REPORT","url":"https://github.com/leejo/CGI.pm/commit/fe9516804d59a3774e280c15dbb7072fbd0ba5f1.patch"},{"type":"REPORT","url":"https://metacpan.org/release/LEEJO/CGI-4.72/source/lib/CGI.pm"},{"type":"REPORT","url":"https://metacpan.org/release/LEEJO/CGI-5.00/changes"},{"type":"REPORT","url":"https://www.rfc-editor.org/rfc/rfc2046#section-5.1.1"}],"affected":[{"package":{"name":"libcgi-pm-perl","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/libcgi-pm-perl?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.21-1","4.22-1","4.25-1","4.26-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libcgi-pm-perl","binary_version":"4.26-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-120635.json"}},{"package":{"name":"libcgi-pm-perl","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/libcgi-pm-perl?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.36-1","4.37-1","4.38-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libcgi-pm-perl","binary_version":"4.38-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-120635.json"}},{"package":{"name":"libcgi-pm-perl","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/libcgi-pm-perl?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.44-1","4.45-1","4.46-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libcgi-pm-perl","binary_version":"4.46-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-120635.json"}},{"package":{"name":"libcgi-pm-perl","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/libcgi-pm-perl?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.51-1","4.53-1","4.54-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libcgi-pm-perl","binary_version":"4.54-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-120635.json"}},{"package":{"name":"libcgi-pm-perl","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/libcgi-pm-perl?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.57-1","4.60-1","4.61-1","4.62-1","4.63-1"],"ecosystem_specific":{"binaries":[{"binary_version":"4.63-1","binary_name":"libcgi-pm-perl"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-120635.json"}},{"package":{"name":"libcgi-pm-perl","ecosystem":"Ubuntu:26.10","purl":"pkg:deb/ubuntu/libcgi-pm-perl?arch=source&distro=stonking"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.71-1build1","4.72-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libcgi-pm-perl","binary_version":"4.72-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-120635.json"}},{"package":{"name":"libcgi-pm-perl","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/libcgi-pm-perl?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.68-1","4.71-1","4.71-1build1"],"ecosystem_specific":{"binaries":[{"binary_version":"4.71-1build1","binary_name":"libcgi-pm-perl"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-120635.json"}}],"schema_version":"1.9.2","severity":[{"type":"Ubuntu","score":"medium"}]}