{"id":"CVE-2025-66286","aliases":["EUVD-2025-209565","GHSA-qx86-g93j-m25r","UBUNTU-CVE-2025-66286"],"status":"published","title":"Webkitgtk: authorization bypass through webpage::send-request signal handler","description":"An API design flaw in WebKitGTK and WPE WebKit allows untrusted web content to unexpectedly perform IP connections, DNS lookups, and HTTP requests. Applications expect to use the\nWebPage::send-request signal handler to approve or reject all network requests. However, certain types of HTTP requests bypass this signal handler.","severity":{"version":"3.1","score":4.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00233,"percentile":0.14244,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-639"],"published":"2026-04-23T12:33:50Z","modified":"2026-11-05T16:36:44Z","affected":[{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"qtwebkit-opensource-src","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.4.2+dfsg-1ubuntu2.1","5.5.1+dfsg-2ubuntu1"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"webkit2gtk","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.8.5+dfsg1-3","2.10.3+dfsg1-1","2.10.4+dfsg1-1","2.10.5-1","2.10.6-1","2.10.6-1ubuntu1","2.10.8-1ubuntu1","2.10.9-1ubuntu1","2.12.5-0ubuntu0.16.04.1","2.14.2-0ubuntu0.16.04.1","2.14.3-0ubuntu0.16.04.1","2.14.5-0ubuntu0.16.04.1","2.16.1-0ubuntu0.16.04.1","2.16.1-0ubuntu0.16.04.2","2.16.2-0ubuntu0.16.04.1","2.16.3-0ubuntu0.16.04.1","2.16.6-0ubuntu0.16.04.1","2.18.0-0ubuntu0.16.04.2","2.18.3-0ubuntu0.16.04.1","2.18.4-0ubuntu0.16.04.1","2.18.5-0ubuntu0.16.04.1","2.18.6-0ubuntu0.16.04.1","2.20.1-0ubuntu0.16.04.1","2.20.2-0ubuntu0.16.04.1","2.20.3-0ubuntu0.16.04.1","2.20.5-0ubuntu0.16.04.1"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"qtwebkit-source","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.3.2-0ubuntu10","2.3.2-0ubuntu11"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"webkitgtk","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.4.9-2ubuntu2","2.4.10-0ubuntu1","2.4.11-0ubuntu0.1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"webkit2gtk","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.18.0-2","2.18.0-2build1","2.18.2-1","2.18.3-1","2.18.4-1","2.18.6-1","2.19.91-1ubuntu1","2.19.92-1","2.20.0-1","2.20.0-2","2.20.0-2ubuntu1","2.20.1-1","2.20.2-0ubuntu0.18.04.1","2.20.3-0ubuntu0.18.04.1","2.20.5-0ubuntu0.18.04.1","2.22.2-0ubuntu0.18.04.1","2.22.2-0ubuntu0.18.04.2","2.22.4-0ubuntu0.18.04.1","2.22.5-0ubuntu0.18.04.1","2.22.6-0ubuntu0.18.04.1","2.24.1-0ubuntu0.18.04.1","2.24.2-0ubuntu0.18.04.1","2.24.4-0ubuntu0.18.04.1","2.26.1-0ubuntu0.18.04.1","2.26.2-0ubuntu0.18.04.1","2.26.3-0ubuntu0.18.04.1","2.26.4-0ubuntu0.18.04.1","2.28.0-0ubuntu0.18.04.3","2.28.1-0ubuntu0.18.04.1","2.28.2-0ubuntu0.18.04.1","2.28.3-0ubuntu0.18.04.1","2.28.4-0ubuntu0.18.04.1","2.30.3-0ubuntu0.18.04.1","2.30.5-0ubuntu0.18.04.1","2.30.6-0ubuntu0.18.04.1","2.32.0-0ubuntu0.18.04.1","2.32.3-0ubuntu0.18.04.1","2.32.4-0ubuntu0.18.04.1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"qtwebkit-opensource-src","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.9.1+dfsg-5ubuntu1","5.9.1+dfsg-5ubuntu3","5.212.0~alpha2-5build2","5.212.0~alpha2-5build4","5.212.0~alpha2-7","5.212.0~alpha2-7build2","5.212.0~alpha2-7ubuntu1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"qtwebkit-source","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.3.2-0ubuntu13"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"webkitgtk","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.4.11-3","2.4.11-3ubuntu2","2.4.11-3ubuntu3"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"webkit2gtk","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.26.1-3","2.26.2-1","2.26.3-1ubuntu2","2.26.4-1ubuntu1","2.28.0-1ubuntu2","2.28.1-1","2.28.2-0ubuntu0.20.04.1","2.28.3-0ubuntu0.20.04.1","2.28.4-0ubuntu0.20.04.1","2.30.3-0ubuntu0.20.04.1","2.30.5-0ubuntu0.20.04.1","2.30.6-0ubuntu0.20.04.1","2.32.0-0ubuntu0.20.04.1","2.32.3-0ubuntu0.20.04.1","2.32.4-0ubuntu0.20.04.1","2.34.1-0ubuntu0.20.04.1","2.34.3-0ubuntu0.20.04.1","2.34.4-0ubuntu0.20.04.1","2.34.6-0ubuntu0.20.04.1","2.36.0-0ubuntu0.20.04.3","2.36.2-0ubuntu0.20.04.1","2.36.3-0ubuntu0.20.04.1","2.36.4-0ubuntu0.20.04.1","2.36.6-0ubuntu0.20.04.1","2.36.7-0ubuntu0.20.04.1","2.36.8-0ubuntu0.20.04.1","2.38.2-0ubuntu0.20.04.1","2.38.3-0ubuntu0.20.04.1","2.38.4-0ubuntu0.20.04.2","2.38.5-0ubuntu0.20.04.1","2.38.6-0ubuntu0.20.04.1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"qtwebkit-opensource-src","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.212.0~alpha3-3","5.212.0~alpha3-5","5.212.0~alpha3-6","5.212.0~alpha3-7","5.212.0~alpha4-1","5.212.0~alpha4-1ubuntu1","5.212.0~alpha4-1ubuntu2","5.212.0~alpha4-1ubuntu2.1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"wpewebkit","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.26.3-1","2.26.4-1","2.26.4-1build1","2.28.0-1","2.28.1-1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"qtwebkit-opensource-src","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"vers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hat","product":"red hat enterprise linux 6"},{"vendor":"red hat","product":"red hat enterprise linux 7"},{"vendor":"red hat","product":"red hat enterprise linux 8"},{"vendor":"red hat","product":"red hat enterprise linux 9"}],"references":[{"url":"https://access.redhat.com/security/cve/CVE-2025-66286","tags":["vdb-entry","x_refsource_REDHAT"]},{"url":"https://bugs.webkit.org/show_bug.cgi?id=259787"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2424652","tags":["issue-tracking","x_refsource_REDHAT"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-66286"},{"url":"https://github.com/advisories/GHSA-qx86-g93j-m25r"},{"url":"https://ubuntu.com/security/CVE-2025-66286","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2025-66286","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2025-66286","title":"Webkitgtk: authorization bypass through webpage::send-request signal handler","description":"An API design flaw in WebKitGTK and WPE WebKit allows untrusted web content to unexpectedly perform IP connections, DNS lookups, and HTTP requests. Applications expect to use the\nWebPage::send-request signal handler to approve or reject all network requests. However, certain types of HTTP requests bypass this signal handler.","status":"published","published":"2026-04-23T12:33:50.184Z","modified":"2026-11-05T16:36:44.456Z","cvss":[{"version":"3.1","score":4.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-639"],"updated_at":"2026-11-05T17:53:58.265681Z"}],"euvd":[{"id":"EUVD-2025-209565","description":"An API design flaw in WebKitGTK and WPE WebKit allows untrusted web content to unexpectedly perform IP connections, DNS lookups, and HTTP requests. Applications expect to use the\nWebPage::send-request signal handler to approve or reject all network requests. However, certain types of HTTP requests bypass this signal handler.","status":"published","published":"2026-04-23T12:33:50Z","modified":"2026-11-05T16:36:44Z","cvss":[{"version":"3.1","score":4.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N","level":"medium"}],"updated_at":"2026-11-05T18:00:57.863749Z"}],"ghsa":[{"id":"GHSA-qx86-g93j-m25r","title":"An API design flaw in WebKitGTK and WPE WebKit allows untrusted web content to unexpectedly...","description":"An API design flaw in WebKitGTK and WPE WebKit allows untrusted web content to unexpectedly perform IP connections, DNS lookups, and HTTP requests. Applications expect to use the\nWebPage::send-request signal handler to approve or reject all network requests. However, certain types of HTTP requests bypass this signal handler.","status":"published","published":"2026-04-23T15:38:56Z","modified":"2026-04-23T15:39:02Z","cvss":[{"version":"3.1","score":4.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N","level":"medium"}],"cwes":["CWE-639"],"updated_at":"2026-11-02T15:07:36.455512Z"}],"nvd":[{"id":"CVE-2025-66286","description":"An API design flaw in WebKitGTK and WPE WebKit allows untrusted web content to unexpectedly perform IP connections, DNS lookups, and HTTP requests. Applications expect to use the\nWebPage::send-request signal handler to approve or reject all network requests. However, certain types of HTTP requests bypass this signal handler.","status":"published","published":"2026-04-23T13:16:11.007Z","modified":"2026-11-05T17:17:19.05Z","cvss":[{"version":"3.1","score":4.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-639"],"updated_at":"2026-11-05T19:55:53.17268Z"}],"osv":[{"id":"UBUNTU-CVE-2025-66286","description":"An API design flaw in WebKitGTK and WPE WebKit allows untrusted web content to unexpectedly perform IP connections, DNS lookups, and HTTP requests. Applications expect to use the WebPage::send-request signal handler to approve or reject all network requests. However, certain types of HTTP requests bypass this signal handler.","status":"published","published":"2026-04-23T13:16:00Z","modified":"2026-10-17T12:57:29.646160914Z","cvss":[{"version":"3.1","score":4.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T16:55:52.345622Z"}]}}