Medium severity6.5NVD Advisory· Published Jun 16, 2026· Updated Jun 17, 2026
CVE-2026-53899
CVE-2026-53899
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
5- osv-coords3 versions
< 152.0-r0+ 2 more
- (no CPE)range: < 152.0-r0
- (no CPE)range: < 0
- (no CPE)range: < 152.0-r0
- Range: >=152.0
- cpe:2.3:a:mozilla:firefox_mobile:*:*:*:*:*:iphone_os:*:*Range: <152.0
Patches
Vulnerability mechanics
References
2- www.mozilla.org/security/advisories/mfsa2026-56/nvdVendor Advisory
- bugzilla.mozilla.org/show_bug.cginvdPermissions Required
News mentions
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