{"id":"CVE-2026-53899","aliases":["EUVD-2026-37077","GHSA-848m-8qg2-wmrv"],"status":"published","title":"Cross-origin cookies could be leaked when opening a PDF link","description":"Firefox for iOS used partial domain matching when attaching cookies to PDF requests, allowing a malicious site on a suffix domain to receive cookies belonging to the target site. This vulnerability was fixed in Firefox for iOS 152.0.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-11","score":0.00096,"percentile":0.00682,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-345"],"published":"2026-06-16T11:53:04Z","modified":"2026-10-28T02:31:06Z","products":[{"vendor":"mozilla","product":"firefox for ios"},{"vendor":"mozilla","product":"firefox_mobile"}],"references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2042909","tags":["Permissions Required","report"]},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-56/","tags":["Vendor Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53899","tags":["advisory"]},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-56"},{"url":"https://github.com/advisories/GHSA-848m-8qg2-wmrv"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53899.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-53899","title":"Cross-origin cookies could be leaked when opening a PDF link","description":"Firefox for iOS used partial domain matching when attaching cookies to PDF requests, allowing a malicious site on a suffix domain to receive cookies belonging to the target site. This vulnerability was fixed in Firefox for iOS 152.0.","status":"published","published":"2026-06-16T11:53:04.805Z","modified":"2026-06-16T15:44:21.57Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"adp"}],"cwes":["CWE-345"],"updated_at":"2026-11-02T14:20:00.11477Z"}],"euvd":[{"id":"EUVD-2026-37077","description":"Firefox for iOS used partial domain matching when attaching cookies to PDF requests, allowing a malicious site on a suffix domain to receive cookies belonging to the target site. This vulnerability was fixed in Firefox for iOS 152.0.","status":"published","published":"2026-06-16T11:53:04Z","modified":"2026-06-16T15:44:21Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T18:20:40.24472Z"}],"ghsa":[{"id":"GHSA-848m-8qg2-wmrv","title":"Firefox for iOS used partial domain matching when attaching cookies to PDF requests, allowing a...","description":"Firefox for iOS used partial domain matching when attaching cookies to PDF requests, allowing a malicious site on a suffix domain to receive cookies belonging to the target site. This vulnerability was fixed in Firefox for iOS 152.0.","status":"published","published":"2026-06-16T15:33:50Z","modified":"2026-06-16T18:33:45Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-345"],"updated_at":"2026-11-02T15:08:49.42455Z"}],"nvd":[{"id":"CVE-2026-53899","description":"Firefox for iOS used partial domain matching when attaching cookies to PDF requests, allowing a malicious site on a suffix domain to receive cookies belonging to the target site. This vulnerability was fixed in Firefox for iOS 152.0.","status":"published","published":"2026-06-16T13:16:37.42Z","modified":"2026-10-26T00:10:00.15Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-345"],"updated_at":"2026-11-02T14:12:24.19758Z"}],"osv":[{"id":"CVE-2026-53899","title":"Cross-origin cookies could be leaked when opening a PDF link","description":"Firefox for iOS used partial domain matching when attaching cookies to PDF requests, allowing a malicious site on a suffix domain to receive cookies belonging to the target site. This vulnerability was fixed in Firefox for iOS 152.0.","status":"published","published":"2026-06-16T11:53:04.805Z","modified":"2026-10-28T02:31:06.961572233Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:45:08.132336Z"}]}}