{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-53899", "assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe", "state": "PUBLISHED", "assignerShortName": "mozilla", "dateReserved": "2026-06-11T06:20:46.257Z", "datePublished": "2026-06-16T11:53:04.805Z", "dateUpdated": "2026-06-16T15:44:21.570Z"}, "containers": {"cna": {"affected": [{"product": "Firefox for iOS", "vendor": "Mozilla", "versions": [{"status": "unaffected", "version": "152.0", "lessThanOrEqual": "*", "versionType": "rpm"}]}], "descriptions": [{"lang": "en", "value": "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.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "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."}]}], "title": "Cross-origin cookies could be leaked when opening a PDF link", "references": [{"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2042909"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2026-56/"}], "credits": [{"lang": "en", "value": "Muneaki Nishimura"}], "providerMetadata": {"orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe", "shortName": "mozilla", "dateUpdated": "2026-06-16T11:53:04.805Z"}}, "adp": [{"problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-345", "lang": "en", "description": "CWE-345 Insufficient Verification of Data Authenticity"}]}], "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-06-16T15:44:07.462912Z", "id": "CVE-2026-53899", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-06-16T15:44:21.570Z"}}]}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-53899", "lastModified": "2026-06-16T14:51:31.350", "metrics": {}, "published": "2026-06-16T13:16:37.420", "references": [{"source": "security@mozilla.org", "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2042909"}, {"source": "security@mozilla.org", "url": "https://www.mozilla.org/security/advisories/mfsa2026-56/"}], "sourceIdentifier": "security@mozilla.org", "vulnStatus": "Awaiting Analysis"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[152.0,*]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Firefox for iOS", "source": "cna", "vendor": "Mozilla"}, "product": "firefox_for_ios", "vendor": "mozilla"}], "created": "2026-06-16T15:45:05.714262+00:00", "updated": "2026-06-16T15:45:05.714305+00:00", "vendors": ["mozilla", "mozilla$PRODUCT$firefox_for_ios"]}