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 arbitrary cookies into requests to an unrelated target domain. This vulnerability was fixed in Firefox for iOS 152.0.
- CVSS 3.1
- 4.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N - EPSS
- 0.1% chance of exploitation in the next 30 days; higher than 0% of CVEs (scores of 2026-10-25)
- CWEs
- CWE-345, CWE-384
- Published
- Modified
- Record from
- the NVD, synced
Affected
- mozilla:firefox_mobile