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CVE PROGRAM SOURCE RECORD6.5 Medium

CVE-2026-53899

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Mozilla Firefox for iOS

  • 152.0 to ≤ *unaffected

References