{"id":"UBUNTU-CVE-2026-120646","details":"CGI versions from 4.71 before 5.00 for Perl allow denial of service via a plain string dereferenced as a symbolic reference in uploadInfo. uploadInfo dereferences its argument and calls its filename method without checking that it is an upload filehandle. A plain string naming a defined global variable, such as the parameter value from ?upload=0, is treated as a symbolic reference, and the method call on it dies.","modified":"2026-11-05T11:47:27.334452170Z","published":"2026-11-04T00:17:00Z","upstream":["CVE-2026-120646"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-120646"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-120646"},{"type":"REPORT","url":"https://lists.security.metacpan.org/cve-announce/msg/44874987/"},{"type":"REPORT","url":"https://github.com/leejo/CGI.pm/commit/a14a7decfdc18f2daf436d30df9b543e3f0f8da3"},{"type":"REPORT","url":"https://github.com/leejo/CGI.pm/commit/a14a7decfdc18f2daf436d30df9b543e3f0f8da3.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-2026-120646.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-2026-120646.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_version":"4.46-1","binary_name":"libcgi-pm-perl"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-120646.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_version":"4.54-1","binary_name":"libcgi-pm-perl"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-120646.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-2026-120646.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_version":"4.72-1","binary_name":"libcgi-pm-perl"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-120646.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-2026-120646.json"}}],"schema_version":"1.9.2","severity":[{"type":"Ubuntu","score":"medium"}]}