Medium severity6.5NVD Advisory· Published Jun 16, 2026· Updated Jun 16, 2026

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

Mozilla Corporation/Firefox for iOSllm-fuzzy
Range: <152.0
osv-coords3 versions
pkg:apk/chainguard/firefox pkg:apk/chainguard/firefox-esr pkg:apk/wolfi/firefox
< 152.0-r0+ 2 more
- (no CPE)range: < 152.0-r0
- (no CPE)range: < 0
- (no CPE)range: < 152.0-r0

Patches

Vulnerability mechanics

References

bugzilla.mozilla.org/show_bug.cginvd
www.mozilla.org/security/advisories/mfsa2026-56/nvd

News mentions

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