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CVE-2026-53899

6.5 medium SSVC exploitation: none Analyzed
NVD · CVE.org

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.

Fix

Patch, vendor advisory and mitigation references on NVD 1

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 1

  1. First seenCVSS 6.5 · mozillaNVD modified 2026-10-26 00:10

Affected (CPE criteria) 1

  • cpe:2.3:a:mozilla:firefox_mobile:*:*:*:*:*:iphone_os:*:*

References 2