Clickjacking issue, information disclosure in the PDF Viewer component. This vulnerability affects Firefox < 147, Firefox ESR < 140.7, Thunderbird < 147, and Thunderbird < 140.7.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable yes

Technical Impact partial

Affected Vendors & Products

Vendors Products
Mozilla
  • Firefox
  • Firefox Esr

No data.

No data.

References
Link Providers
https://bugzilla.mozilla.org/show_bug.cgi?id=2006500 cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-0887 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-0887 cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-01/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-03/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-03/#CVE-2026-0887 cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-04/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-05/ cve-icon cve-icon
History

Thu, 15 Jan 2026 09:45:00 +0000

Type Values Removed Values Added
Description Clickjacking issue, information disclosure in the PDF Viewer component. This vulnerability affects Firefox < 147 and Firefox ESR < 140.7. Clickjacking issue, information disclosure in the PDF Viewer component. This vulnerability affects Firefox < 147, Firefox ESR < 140.7, Thunderbird < 147, and Thunderbird < 140.7.
References

Wed, 14 Jan 2026 11:15:00 +0000

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

Wed, 14 Jan 2026 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 threat_severity

Moderate

Tue, 13 Jan 2026 21:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-497
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'}

ssvc

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

Tue, 13 Jan 2026 14:00:00 +0000

Type Values Removed Values Added
Description Clickjacking issue, information disclosure in the PDF Viewer component. This vulnerability affects Firefox < 147 and Firefox ESR < 140.7.
Title Clickjacking issue, information disclosure in the PDF Viewer component
References
cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published: 2026-01-13T13:30:57.847Z

Updated: 2026-01-15T09:31:14.501Z

Reserved: 2026-01-13T13:30:57.650Z

Link: CVE-2026-0887

cve-icon Vulnrichment

Updated: 2026-01-13T20:29:00.023Z

cve-icon NVD

Status : Undergoing Analysis

Published: 2026-01-13T14:16:39.240

Modified: 2026-01-15T10:16:07.877

Link: CVE-2026-0887

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-01-13T13:30:57Z

Links: CVE-2026-0887 - Bugzilla