CVE-2026-53900: Firefox for iOS preserved cookies set on the initial PDF request across cross-origin HTTP redirects in TemporaryDocument, allowing a malicious site to inject…

PriorityP421medium4.3CVSS 3.1

AVNACLPRNUIRSUCLINAN

EPSS

0.10%

1.0th percentile

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 Firefox for iOS 152.0.

Affected

1 ranges

Vendor	Product	Version range	Fixed in
mozilla	firefox_for_ios	< Firefox for iOS 152	Firefox for iOS 152

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