CVE-2026-53899

CVE-2026-53899 affects Firefox for iOS. The issue arises from partial domain matching when attaching cookies to PDF requests, enabling a malicious site on a suffix domain to receive cookies belonging to the target site. The root cause is tied to how cookies were matched during PDF handling, leadi...

CVE-2026-53900

CVE-2026-53900 concerns Firefox for iOS. The issue: cookies set on the initial PDF request were preserved across cross-origin HTTP redirects in TemporaryDocument, enabling a malicious site to inject cookies into requests to an unrelated target domain. The CVE has a base score of 4.3 (Medium) per ...