CVE catalog
CVE-2026-53899
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 wa
- Severity
- Medium · CVSS 6.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.10% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Cpe | firefox_mobile | Not reported | 152.0 | fixed |
| Cpe | firefox_mobile | Not reported | 152.0 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Cpe | firefox_mobile | cpe | Not reported | 152.0 | Not reported | Not reported | Not reported |
| Cpe | firefox_mobile | cpe | Not reported | 152.0 | Not reported | NVD-CVE-2026-53899 | Not reported |
OpenFactory catalog packages
No matching packages in this catalog.
Observed:
References
- [https://bugzilla.mozilla.org/show_bug.cgi?id=2042909]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-53899]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1961.json]
- [https://www.mozilla.org/security/advisories/mfsa2026-56/]
[CERT-Bund public advisories] · [FIRST EPSS] · [National Vulnerability Database (NVD)]