{"id":"CVE-2026-120636","aliases":["AZL-112765","DEBIAN-CVE-2026-120636","EUVD-2026-116603","GHSA-7432-xjrv-h264","UBUNTU-CVE-2026-120636","openSUSE-SU-2026:12465-1"],"status":"published","title":"CGI versions before 5.00 for Perl allow open redirects and script injection via URLs built from REQUEST_URI in url and start_form","description":"CGI versions before 5.00 for Perl allow open redirects and script injection via URLs built from REQUEST_URI in url and start_form.\n\nurl(-absolute=\u003e1), url(-relative=\u003e1) and the default start_form action are built from the client-supplied REQUEST_URI without validation. The result can be protocol-relative (//evil.example), absolute-form (http://evil.example/) or contain backslashes, and url(-relative=\u003e1) can return a javascript: URL. Links and form posts built from these URLs can go to another host.","severity":{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-12","score":0.0026,"percentile":0.17916,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-601","CWE-79"],"published":"2026-11-03T23:40:18Z","modified":"2026-11-09T19:10:42Z","affected":[{"source":"osv","ecosystem":"Azure Linux:3","package":"perl-CGI","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"4.60-1"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"libcgi-pm-perl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.55-1","4.57-1","4.59-1","4.60-1","4.61-1","4.62-1","4.63-1","4.64-1","4.65-1","4.66-1","4.67-1","4.68-1","4.70-1","4.71-1","4.72-1","5.02-1"]},{"source":"osv","ecosystem":"Debian:13","package":"libcgi-pm-perl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.68-1","4.70-1","4.71-1","4.72-1","5.02-1"]},{"source":"osv","ecosystem":"Debian:14","package":"libcgi-pm-perl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.68-1","4.70-1","4.71-1","4.72-1","5.02-1"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"libcgi-pm-perl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.21-1","4.22-1","4.25-1","4.26-1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"libcgi-pm-perl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.36-1","4.37-1","4.38-1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"libcgi-pm-perl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.44-1","4.45-1","4.46-1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"libcgi-pm-perl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.51-1","4.53-1","4.54-1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"libcgi-pm-perl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.57-1","4.60-1","4.61-1","4.62-1","4.63-1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"libcgi-pm-perl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.71-1build1","4.72-1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"libcgi-pm-perl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.68-1","4.71-1","4.71-1build1"]},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"perl-CGI","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.20.0-1.1"}]}],"bundled":20}],"references":[{"url":"https://metacpan.org/release/LEEJO/CGI-4.72/source/lib/CGI.pm","tags":["technical-description","article","report"]},{"url":"https://metacpan.org/release/LEEJO/CGI-5.00/changes","tags":["release-notes","advisory","report"]},{"url":"https://github.com/leejo/CGI.pm/commit/9405ef3909ee94991a3474167aa53b9051bd8765.patch","tags":["patch","fix","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-120636","tags":["web","advisory"]},{"url":"https://github.com/advisories/GHSA-7432-xjrv-h264"},{"url":"https://cpan.org/modules","tags":["web"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/120xxx/CVE-2026-120636.json","tags":["advisory"]},{"url":"https://github.com/leejo/CGI.pm","tags":["package"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-120636","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-120636","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-120636","tags":["report"]},{"url":"https://lists.security.metacpan.org/cve-announce/msg/44874807/","tags":["report"]},{"url":"https://github.com/leejo/CGI.pm/commit/9405ef3909ee94991a3474167aa53b9051bd8765","tags":["report"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2026-120631","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-120632","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-120633","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-120634","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-120635","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-120636","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-120637","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-120638","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-120639","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-120640","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-120641","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-120642","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-120643","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-120644","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-120645","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-120646","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-120647","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-120648","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-120650","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-120651","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2026-120636","title":"CGI versions before 5.00 for Perl allow open redirects and script injection via URLs built from REQUEST_URI in url and start_form","description":"CGI versions before 5.00 for Perl allow open redirects and script injection via URLs built from REQUEST_URI in url and start_form.\n\nurl(-absolute=\u003e1), url(-relative=\u003e1) and the default start_form action are built from the client-supplied REQUEST_URI without validation. The result can be protocol-relative (//evil.example), absolute-form (http://evil.example/) or contain backslashes, and url(-relative=\u003e1) can return a javascript: URL. Links and form posts built from these URLs can go to another host.","status":"published","published":"2026-11-03T23:40:18.085Z","modified":"2026-11-09T19:10:42.011Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"adp"}],"cwes":["CWE-601","CWE-79"],"updated_at":"2026-11-09T20:34:41.792859Z"}],"euvd":[{"id":"EUVD-2026-116603","description":"CGI versions before 5.00 for Perl allow open redirects and script injection via URLs built from REQUEST_URI in url and start_form.\n\nurl(-absolute=\u003e1), url(-relative=\u003e1) and the default start_form action are built from the client-supplied REQUEST_URI without validation. The result can be protocol-relative (//evil.example), absolute-form (http://evil.example/) or contain backslashes, and url(-relative=\u003e1) can return a javascript: URL. Links and form posts built from these URLs can go to another host.","status":"published","published":"2026-11-03T23:40:18Z","modified":"2026-11-09T19:10:42Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-09T20:18:00.239313Z"}],"ghsa":[{"id":"GHSA-7432-xjrv-h264","title":"CGI versions before 5.00 for Perl allow open redirects and script injection via URLs built from...","description":"CGI versions before 5.00 for Perl allow open redirects and script injection via URLs built from REQUEST_URI in url and start_form.\n\nurl(-absolute=\u003e1), url(-relative=\u003e1) and the default start_form action are built from the client-supplied REQUEST_URI without validation. The result can be protocol-relative (//evil.example), absolute-form (http://evil.example/) or contain backslashes, and url(-relative=\u003e1) can return a javascript: URL. Links and form posts built from these URLs can go to another host.","status":"published","published":"2026-11-04T00:32:21Z","modified":"2026-11-09T21:32:42Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-09T21:50:04.401146Z"}],"nvd":[{"id":"CVE-2026-120636","description":"CGI versions before 5.00 for Perl allow open redirects and script injection via URLs built from REQUEST_URI in url and start_form.\n\nurl(-absolute=\u003e1), url(-relative=\u003e1) and the default start_form action are built from the client-supplied REQUEST_URI without validation. The result can be protocol-relative (//evil.example), absolute-form (http://evil.example/) or contain backslashes, and url(-relative=\u003e1) can return a javascript: URL. Links and form posts built from these URLs can go to another host.","status":"published","published":"2026-11-04T00:17:24.867Z","modified":"2026-11-09T19:16:44.123Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-79","CWE-601"],"updated_at":"2026-11-09T22:15:54.230687Z"}],"osv":[{"id":"CVE-2026-120636","title":"CGI versions before 5.00 for Perl allow open redirects and script injection via URLs built from REQUEST_URI in url and start_form","description":"CGI versions before 5.00 for Perl allow open redirects and script injection via URLs built from REQUEST_URI in url and start_form.\n\nurl(-absolute=\u003e1), url(-relative=\u003e1) and the default start_form action are built from the client-supplied REQUEST_URI without validation. The result can be protocol-relative (//evil.example), absolute-form (http://evil.example/) or contain backslashes, and url(-relative=\u003e1) can return a javascript: URL. Links and form posts built from these URLs can go to another host.","status":"published","published":"2026-11-03T23:40:18.085Z","modified":"2026-11-11T10:30:31.691415981Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-601","CWE-79"],"updated_at":"2026-11-10T10:57:25.458985Z"},{"id":"DEBIAN-CVE-2026-120636","description":"CGI versions before 5.00 for Perl allow open redirects and script injection via URLs built from REQUEST_URI in url and start_form.  url(-absolute=\u003e1), url(-relative=\u003e1) and the default start_form action are built from the client-supplied REQUEST_URI without validation. The result can be protocol-relative (//evil.example), absolute-form (http://evil.example/) or contain backslashes, and url(-relative=\u003e1) can return a javascript: URL. Links and form posts built from these URLs can go to another host.","status":"published","published":"2026-11-04T00:17:24.867Z","modified":"2026-11-10T10:00:14.569238982Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-10T10:26:30.347596Z"},{"id":"UBUNTU-CVE-2026-120636","description":"CGI versions before 5.00 for Perl allow open redirects and script injection via URLs built from REQUEST_URI in url and start_form. url(-absolute=\u003e1), url(-relative=\u003e1) and the default start_form action are built from the client-supplied REQUEST_URI without validation. The result can be protocol-relative (//evil.example), absolute-form (http://evil.example/) or contain backslashes, and url(-relative=\u003e1) can return a javascript: URL. Links and form posts built from these URLs can go to another host.","status":"published","published":"2026-11-04T00:17:00Z","modified":"2026-11-12T17:25:21.42969384Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-12T18:05:20.870791Z"},{"id":"AZL-112765","title":"CVE-2026-120636 affecting package perl-CGI 4.60-1","description":"CGI versions before 5.00 for Perl allow open redirects and script injection via URLs built from REQUEST_URI in url and start_form.\n\nurl(-absolute=\u003e1), url(-relative=\u003e1) and the default start_form action are built from the client-supplied REQUEST_URI without validation. The result can be protocol-relative (//evil.example), absolute-form (http://evil.example/) or contain backslashes, and url(-relative=\u003e1) can return a javascript: URL. Links and form posts built from these URLs can go to another host.","status":"published","published":"2026-11-04T00:17:24Z","modified":"2026-11-07T14:16:26.289871762Z","updated_at":"2026-11-07T14:48:25.680996Z"},{"id":"openSUSE-SU-2026:12465-1","title":"perl-CGI-5.20.0-1.1 on GA media","description":"These are all security issues fixed in the perl-CGI-5.20.0-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2026-11-06T00:00:00Z","modified":"2026-11-07T17:23:15.83251468Z","updated_at":"2026-11-07T17:50:39.727056Z"}]}}