CVE-2026-53900EPSS p1.1%
CVE-2026-53900CVE-2026-53900
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.
Scoring
| CVSS | 4.3 () |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N |
| EPSS | 0.10% probability of exploitation · percentile 1.1% · 2026-06-18T12:00:27Z |
| Last modified | 2026-06-16 |