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.

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Solution

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Workaround

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History

Tue, 16 Jun 2026 15:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-345
CWE-384
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 16 Jun 2026 15:15:00 +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 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.
Title Cookie injection was possible when opening a PDF link
References

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cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

Updated: 2026-06-16T14:37:32.358Z

Reserved: 2026-06-11T06:20:46.258Z

Link: CVE-2026-53900

cve-icon Vulnrichment

Updated: 2026-06-16T14:36:52.419Z

cve-icon NVD

Status : Undergoing Analysis

Published: 2026-06-16T13:16:37.517

Modified: 2026-06-16T15:16:44.727

Link: CVE-2026-53900

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-16T15:00:06Z

Weaknesses