{"id":"CVE-2026-53900","aliases":["EUVD-2026-37078","GHSA-6xv8-mg86-mq56"],"status":"published","title":"Cookie injection was possible when opening a PDF link","description":"Firefox for iOS preserved cookies set on the initial PDF request across cross-origin HTTP redirects in TemporaryDocument, allowing a malicious site to inject arbitrary cookies into requests to an unrelated target domain. This vulnerability was fixed in Firefox for iOS 152.0.","severity":{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N","level":"medium","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-12","score":0.001,"percentile":0.00826,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-345","CWE-384"],"published":"2026-06-16T11:53:05Z","modified":"2026-10-28T02:30:21Z","products":[{"vendor":"mozilla","product":"firefox for ios"},{"vendor":"mozilla","product":"firefox_mobile"}],"references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2043204","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-2026-53900","tags":["advisory"]},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-56"},{"url":"https://github.com/advisories/GHSA-6xv8-mg86-mq56"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53900.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-53900","title":"Cookie injection was possible when opening a PDF link","description":"Firefox for iOS preserved cookies set on the initial PDF request across cross-origin HTTP redirects in TemporaryDocument, allowing a malicious site to inject arbitrary cookies into requests to an unrelated target domain. This vulnerability was fixed in Firefox for iOS 152.0.","status":"published","published":"2026-06-16T11:53:05.773Z","modified":"2026-06-16T14:37:32.358Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N","level":"medium","assessor":"adp"}],"cwes":["CWE-345","CWE-384"],"updated_at":"2026-11-02T14:20:00.11477Z"}],"euvd":[{"id":"EUVD-2026-37078","description":"Firefox for iOS preserved cookies set on the initial PDF request across cross-origin HTTP redirects in TemporaryDocument, allowing a malicious site to inject arbitrary cookies into requests to an unrelated target domain. This vulnerability was fixed in Firefox for iOS 152.0.","status":"published","published":"2026-06-16T11:53:05Z","modified":"2026-06-16T14:37:32Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T18:20:40.605509Z"}],"ghsa":[{"id":"GHSA-6xv8-mg86-mq56","title":"Firefox for iOS preserved cookies set on the initial PDF request across cross-origin HTTP...","description":"Firefox for iOS preserved cookies set on the initial PDF request across cross-origin HTTP redirects in TemporaryDocument, allowing a malicious site to inject arbitrary cookies into requests to an unrelated target domain. This vulnerability was fixed in Firefox for iOS 152.0.","status":"published","published":"2026-06-16T15:33:50Z","modified":"2026-06-16T15:33:51Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N","level":"medium"}],"cwes":["CWE-345"],"updated_at":"2026-11-02T15:08:48.835344Z"}],"nvd":[{"id":"CVE-2026-53900","description":"Firefox for iOS preserved cookies set on the initial PDF request across cross-origin HTTP redirects in TemporaryDocument, allowing a malicious site to inject arbitrary cookies into requests to an unrelated target domain. This vulnerability was fixed in Firefox for iOS 152.0.","status":"published","published":"2026-06-16T13:16:37.517Z","modified":"2026-10-26T12:10:00.13Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-345","CWE-384"],"updated_at":"2026-11-02T14:12:24.19758Z"}],"osv":[{"id":"CVE-2026-53900","title":"Cookie injection was possible when opening a PDF link","description":"Firefox for iOS preserved cookies set on the initial PDF request across cross-origin HTTP redirects in TemporaryDocument, allowing a malicious site to inject arbitrary cookies into requests to an unrelated target domain. This vulnerability was fixed in Firefox for iOS 152.0.","status":"published","published":"2026-06-16T11:53:05.773Z","modified":"2026-10-28T02:30:21.655302165Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:45:08.132336Z"}]}}