CVE-2026-0887

Clickjacking issue, information disclosure in the PDF Viewer component

Medium · published January 13, 2026

CVSS v3.1
4.3
EPSS
0%
Percentile
24.5
In the wild
Unconfirmed
What it is

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

The record
Technical detail
CVSS v3.1
4.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00326 · 24.5th percentile
Published
2026-01-13T13:30Z
EPSS history
Timeline
  • 13 JAN 13:30Z
    Clickjacking issue, information disclosure in the PDF Viewer component
    cvelistv5