{"id":"CVE-2019-19916","aliases":["EUVD-2019-9507","GHSA-fvrf-8qfm-6jmf","UBUNTU-CVE-2019-19916"],"status":"published","title":"In Midori Browser 0.5.11 (on Windows 10), Content Security Policy (CSP) is not applied correctly...","description":"In Midori Browser 0.5.11 (on Windows 10), Content Security Policy (CSP) is not applied correctly to all parts of multipart content sent with the multipart/x-mixed-replace MIME type. This could result in script running where CSP should have blocked it, allowing for cross-site scripting (XSS) and other attacks when the product renders the content as HTML. Remediating this would also need to consider the polyglot case, e.g., a file that is a valid GIF image and also valid JavaScript.","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":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.0157,"percentile":0.75549,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2019-12-20T15:07:12Z","modified":"2026-06-17T02:27:26Z","affected":[{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"midori","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.4.3+dfsg-0.2","0.5.11-2","0.5.11-ds1-1","0.5.11-ds1-2"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"midori","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["7.0-2","7.0-2.1"]}],"products":[{"vendor":"midori-browser","product":"midori"}],"references":[{"url":"https://github.com/V1n1v131r4/MIME-Confusion-Attack-on-Midori-Browser/blob/master/README.md","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","report"]},{"url":"https://blog.mozilla.org/security/2016/08/26/mitigating-mime-confusion-attacks-in-firefox/","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","report"]},{"url":"https://portswigger.net/research/bypassing-csp-using-polyglot-jpegs","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-19916"},{"url":"https://github.com/advisories/GHSA-fvrf-8qfm-6jmf"},{"url":"https://ubuntu.com/security/CVE-2019-19916","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2019-19916","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2019-19916","description":"In Midori Browser 0.5.11 (on Windows 10), Content Security Policy (CSP) is not applied correctly to all parts of multipart content sent with the multipart/x-mixed-replace MIME type. This could result in script running where CSP should have blocked it, allowing for cross-site scripting (XSS) and other attacks when the product renders the content as HTML. Remediating this would also need to consider the polyglot case, e.g., a file that is a valid GIF image and also valid JavaScript.","status":"published","published":"2019-12-20T15:07:12Z","modified":"2024-08-05T02:32:10.084Z","updated_at":"2026-11-02T14:20:20.74896Z"}],"euvd":[{"id":"EUVD-2019-9507","description":"In Midori Browser 0.5.11 (on Windows 10), Content Security Policy (CSP) is not applied correctly to all parts of multipart content sent with the multipart/x-mixed-replace MIME type. This could result in script running where CSP should have blocked it, allowing for cross-site scripting (XSS) and other attacks when the product renders the content as HTML. Remediating this would also need to consider the polyglot case, e.g., a file that is a valid GIF image and also valid JavaScript.","status":"published","published":"2019-12-20T15:07:12Z","modified":"2024-08-05T02:32:10Z","updated_at":"2026-11-03T02:40:23.251012Z"}],"ghsa":[{"id":"GHSA-fvrf-8qfm-6jmf","title":"In Midori Browser 0.5.11 (on Windows 10), Content Security Policy (CSP) is not applied correctly...","description":"In Midori Browser 0.5.11 (on Windows 10), Content Security Policy (CSP) is not applied correctly to all parts of multipart content sent with the multipart/x-mixed-replace MIME type. This could result in script running where CSP should have blocked it, allowing for cross-site scripting (XSS) and other attacks when the product renders the content as HTML. Remediating this would also need to consider the polyglot case, e.g., a file that is a valid GIF image and also valid JavaScript.","status":"published","published":"2022-05-24T17:04:50Z","modified":"2023-01-29T05:00:57Z","updated_at":"2026-11-02T14:44:42.149134Z"}],"nvd":[{"id":"CVE-2019-19916","description":"In Midori Browser 0.5.11 (on Windows 10), Content Security Policy (CSP) is not applied correctly to all parts of multipart content sent with the multipart/x-mixed-replace MIME type. This could result in script running where CSP should have blocked it, allowing for cross-site scripting (XSS) and other attacks when the product renders the content as HTML. Remediating this would also need to consider the polyglot case, e.g., a file that is a valid GIF image and also valid JavaScript.","status":"published","published":"2019-12-20T16:15:12.233Z","modified":"2026-06-17T02:27:26.757Z","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":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:05:40.856496Z"}],"osv":[{"id":"UBUNTU-CVE-2019-19916","description":"In Midori Browser 0.5.11 (on Windows 10), Content Security Policy (CSP) is not applied correctly to all parts of multipart content sent with the multipart/x-mixed-replace MIME type. This could result in script running where CSP should have blocked it, allowing for cross-site scripting (XSS) and other attacks when the product renders the content as HTML. Remediating this would also need to consider the polyglot case, e.g., a file that is a valid GIF image and also valid JavaScript.","status":"published","published":"2019-12-20T16:15:00Z","modified":"2025-10-24T04:48:07Z","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":"2026-11-02T15:54:21.213407Z"}]}}