Mozilla Firefox iOS: Mehrere Schwachstellen ermöglichen Manipulation von Dateien und die Offenlegung von Informationen

Summary

Product

Vulnerabilities 2

• Medium 6.5
  CVE-2026-53899

  Cross-origin cookies could be leaked when opening a PDF link

  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.

  Mozilla Firefox for iOS firefox iOS Browsers Wolfi
  Jun 16, 2026
• Medium 4.3
  CVE-2026-53900

  Cookie injection was possible when opening a PDF link

  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 Firefo…

  Mozilla Firefox for iOS firefox iOS Browsers Wolfi
  Jun 16, 2026

Revision history

1. 2026-06-16 #1

   Initiale Fassung

References

• Mozilla Security Advisory mfsa2026-56 vom 2026-06-16
  https://www.mozilla.org/en-US/security/advisories/mfsa2026-56/