{"id":"CVE-2023-38199","aliases":["DEBIAN-CVE-2023-38199","DLA-4488-1","EUVD-2023-42021","GHSA-662c-vg67-m327","UBUNTU-CVE-2023-38199","openSUSE-SU-2024:13187-1"],"status":"published","title":"coreruleset (aka OWASP ModSecurity Core Rule Set) through 3.3.4 does not block multiple Content...","description":"coreruleset (aka OWASP ModSecurity Core Rule Set) through 3.3.4 does not detect multiple Content-Type request headers on some platforms. This might allow attackers to bypass a WAF with a crafted payload, aka \"Content-Type confusion\" between the WAF and the backend application. This occurs when the web application relies on only the last Content-Type header. Other platforms may reject the additional Content-Type header or merge conflicting headers, leading to detection as a malformed header.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.00748,"percentile":0.55343,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-843"],"published":"2023-07-13T00:00:00Z","modified":"2026-10-28T02:30:55Z","fixes":[{"ecosystem":"Debian:12","package":"modsecurity-crs","fixed_in":["3.3.4-1+deb12u2"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"modsecurity-crs","fixed_in":["3.3.5-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"modsecurity-crs","fixed_in":["3.3.5-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"modsecurity-crs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.3.4-1+deb12u2"}]}],"versions":["3.3.4-1","3.3.4-1+deb12u1"]},{"source":"osv","ecosystem":"Debian:13","package":"modsecurity-crs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.3.5-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"modsecurity-crs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.3.5-1"}]}]},{"source":"osv","ecosystem":"Debian:11","package":"modsecurity-crs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.3.4-1~deb11u2"}]}],"versions":["3.3.0-1","3.3.0-1+deb11u1","3.3.2-1","3.3.4-1~deb11u1"],"bundled":2},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"modsecurity-crs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.2.9-1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"modsecurity-crs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.0.0-3","3.0.2-1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"modsecurity-crs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1.1-1","3.2.0-1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"modsecurity-crs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.3.0-1","3.3.2-1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"modsecurity-crs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.3.5-1","3.3.5-2"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"modsecurity-crs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.3.7-1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"modsecurity-crs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.3.8-1","3.3.9-1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"modsecurity-crs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.3.7-1","3.3.8-1"]}],"products":[{"vendor":"owasp","product":"coreruleset"}],"references":[{"url":"https://github.com/coreruleset/coreruleset/issues/3191","tags":["x_transferred","Issue Tracking","Patch","report"]},{"url":"https://github.com/coreruleset/coreruleset/pull/3237","tags":["x_transferred","Issue Tracking","fix","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-38199","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-662c-vg67-m327"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/38xxx/CVE-2023-38199.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2023-38199","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2023-38199","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-38199","tags":["report"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2023-38199","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2023-38199","description":"coreruleset (aka OWASP ModSecurity Core Rule Set) through 3.3.4 does not detect multiple Content-Type request headers on some platforms. This might allow attackers to bypass a WAF with a crafted payload, aka \"Content-Type confusion\" between the WAF and the backend application. This occurs when the web application relies on only the last Content-Type header. Other platforms may reject the additional Content-Type header or merge conflicting headers, leading to detection as a malformed header.","status":"published","published":"2023-07-13T00:00:00Z","modified":"2024-10-30T18:55:24.723Z","updated_at":"2026-11-02T14:35:30.116696Z"}],"euvd":[{"id":"EUVD-2023-42021","description":"coreruleset (aka OWASP ModSecurity Core Rule Set) through 3.3.4 does not detect multiple Content-Type request headers on some platforms. This might allow attackers to bypass a WAF with a crafted payload, aka \"Content-Type confusion\" between the WAF and the backend application. This occurs when the web application relies on only the last Content-Type header. Other platforms may reject the additional Content-Type header or merge conflicting headers, leading to detection as a malformed header.","status":"published","published":"2023-07-13T00:00:00Z","modified":"2024-10-30T18:55:24Z","updated_at":"2026-11-03T00:05:13.91882Z"}],"ghsa":[{"id":"GHSA-662c-vg67-m327","title":"coreruleset (aka OWASP ModSecurity Core Rule Set) through 3.3.4 does not block multiple Content...","description":"coreruleset (aka OWASP ModSecurity Core Rule Set) through 3.3.4 does not block multiple Content-Type headers, which might allow attackers to bypass a WAF with a crafted payload, aka \"Content-Type confusion.\" This occurs when the web application relies on only the last Content-Type header.","status":"published","published":"2023-07-13T03:30:48Z","modified":"2024-04-04T06:06:26Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-843"],"updated_at":"2026-11-02T14:56:39.294815Z"}],"nvd":[{"id":"CVE-2023-38199","description":"coreruleset (aka OWASP ModSecurity Core Rule Set) through 3.3.4 does not detect multiple Content-Type request headers on some platforms. This might allow attackers to bypass a WAF with a crafted payload, aka \"Content-Type confusion\" between the WAF and the backend application. This occurs when the web application relies on only the last Content-Type header. Other platforms may reject the additional Content-Type header or merge conflicting headers, leading to detection as a malformed header.","status":"published","published":"2023-07-13T03:15:10.023Z","modified":"2026-06-17T06:09:38.953Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"}],"cwes":["CWE-843"],"updated_at":"2026-11-02T14:08:15.91037Z"}],"osv":[{"id":"DEBIAN-CVE-2023-38199","description":"coreruleset (aka OWASP ModSecurity Core Rule Set) through 3.3.4 does not detect multiple Content-Type request headers on some platforms. This might allow attackers to bypass a WAF with a crafted payload, aka \"Content-Type confusion\" between the WAF and the backend application. This occurs when the web application relies on only the last Content-Type header. Other platforms may reject the additional Content-Type header or merge conflicting headers, leading to detection as a malformed header.","status":"published","published":"2023-07-13T03:15:10.023Z","modified":"2026-10-26T18:03:06.438342981Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:45:39.980321Z"},{"id":"UBUNTU-CVE-2023-38199","description":"coreruleset (aka OWASP ModSecurity Core Rule Set) through 3.3.4 does not detect multiple Content-Type request headers on some platforms. This might allow attackers to bypass a WAF with a crafted payload, aka \"Content-Type confusion\" between the WAF and the backend application. This occurs when the web application relies on only the last Content-Type header. Other platforms may reject the additional Content-Type header or merge conflicting headers, leading to detection as a malformed header.","status":"published","published":"2023-07-13T03:15:00Z","modified":"2026-10-17T12:57:20.397082578Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T16:54:21.882004Z"},{"id":"CVE-2023-38199","description":"coreruleset (aka OWASP ModSecurity Core Rule Set) through 3.3.4 does not detect multiple Content-Type request headers on some platforms. This might allow attackers to bypass a WAF with a crafted payload, aka \"Content-Type confusion\" between the WAF and the backend application. This occurs when the web application relies on only the last Content-Type header. Other platforms may reject the additional Content-Type header or merge conflicting headers, leading to detection as a malformed header.","status":"published","published":"2023-07-13T00:00:00Z","modified":"2026-10-28T02:30:55.552727923Z","updated_at":"2026-11-02T15:44:32.922049Z"},{"id":"DLA-4488-1","title":"modsecurity-crs - security update","status":"published","published":"2026-02-22T00:00:00Z","modified":"2026-02-22T10:30:29.546572Z","updated_at":"2026-11-02T15:46:12.7027Z"},{"id":"openSUSE-SU-2024:13187-1","title":"owasp-modsecurity-crs-3.3.5-1.1 on GA media","description":"These are all security issues fixed in the owasp-modsecurity-crs-3.3.5-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T04:07:37.826815Z","updated_at":"2026-11-02T16:58:36.025801Z"}]}}