{"id":"UBUNTU-CVE-2026-120632","details":"CGI versions before 5.00 for Perl allow CPU exhaustion via a backtracking regex on the XForms multipart/related Content-Type. When a POST Content-Type contains multipart/related, the boundary and start parameters are extracted with an unanchored pattern that puts .+ on either side of the boundary capture, which backtracks in cubic time on a header that does not match. No request body is needed.","modified":"2026-11-05T11:45:24.875910816Z","published":"2026-11-04T00:17:00Z","upstream":["CVE-2026-120632"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-120632"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-120632"},{"type":"REPORT","url":"https://lists.security.metacpan.org/cve-announce/msg/44874729/"},{"type":"REPORT","url":"https://github.com/leejo/CGI.pm/commit/1e529c7ac8d410a51b4b04ab9d6cc00d51ef33c0"},{"type":"REPORT","url":"https://github.com/leejo/CGI.pm/commit/1e529c7ac8d410a51b4b04ab9d6cc00d51ef33c0.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"}],"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-2026-120632.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-2026-120632.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-2026-120632.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-2026-120632.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_name":"libcgi-pm-perl","binary_version":"4.63-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-120632.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-2026-120632.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_name":"libcgi-pm-perl","binary_version":"4.71-1build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-120632.json"}}],"schema_version":"1.9.2","severity":[{"type":"Ubuntu","score":"medium"}]}