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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox for iOS | — | 152.0 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | firefox | 152.0-r0 | — |
Advisories 1
- WID-SEC-2026-1961 Mozilla Firefox iOS: Mehrere Schwachstellen ermöglichen Manipulation von Dateien und die Offenlegung von Informationen BSI CERT-Bund (WID) · Jun 16, 2026