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CVE-2026-53900

Firefox for iOS

Description

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.

CVSS 4.3EPSS 0.1%Risk 0.43
View source
Published
2026-06-16 13:16:37
Affected versions
<152.0
Type
Web application
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N