CVE-2026-0887

MEDIUM

4.3

Description

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

CVE Details

CVSS v3.1 Score4.3

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionREQUIRED

Published1/13/2026

Last Modified1/22/2026

Sourcenvd

Honeypot Sightings0

Affected Products

mozilla:firefoxmozilla:thunderbird

Weaknesses (CWE)

CWE-497

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2006500(security@mozilla.org)

https://www.mozilla.org/security/advisories/mfsa2026-01/(security@mozilla.org)

https://www.mozilla.org/security/advisories/mfsa2026-03/(security@mozilla.org)

https://www.mozilla.org/security/advisories/mfsa2026-04/(security@mozilla.org)

https://www.mozilla.org/security/advisories/mfsa2026-05/(security@mozilla.org)

IOC Correlations

No correlations recorded

This product uses data from the NVD API but is not endorsed or certified by the NVD.