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.
History

Tue, 16 Jun 2026 17:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-345
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 16 Jun 2026 16:00:00 +0000

Type Values Removed Values Added
First Time appeared Mozilla
Mozilla firefox For Ios
Vendors & Products Mozilla
Mozilla firefox For Ios

Tue, 16 Jun 2026 13:15:00 +0000

Type Values Removed Values Added
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.
Title Cross-origin cookies could be leaked when opening a PDF link
References

cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

Updated: 2026-06-16T15:44:21.570Z

Reserved: 2026-06-11T06:20:46.257Z

Link: CVE-2026-53899

cve-icon Vulnrichment

Updated: 2026-06-16T15:42:35.973Z

cve-icon NVD

Status : Undergoing Analysis

Published: 2026-06-16T13:16:37.420

Modified: 2026-06-16T17:16:42.767

Link: CVE-2026-53899

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-16T15:45:05Z