CVE-2026-16357

Incorrect boundary conditions in the Graphics component

Critical · published July 21, 2026

CVSS v3.1
9.8
EPSS
0%
Percentile
33.6
In the wild
Unconfirmed
What it is

Incorrect boundary conditions in the Graphics component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00405 · 33.6th percentile
Published
2026-07-21T12:37Z
EPSS history
Timeline
  • 21 JUL 12:37Z
    Incorrect boundary conditions in the Graphics component
    cvelistv5