CVE-2026-100764CWE-119

CVE-2026-100764

High · published September 29, 2026

CVSS v3.1
8.8
EPSS
0%
Percentile
13.2
In the wild
Unconfirmed
What it is

Privilege escalation due to incorrect boundary conditions in the Graphics: WebGPU component. This vulnerability was fixed in Thunderbird 157 and Firefox 157.

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00231 · 13.2th percentile
Weakness
CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer
Published
2026-09-29T17:17Z
Affected products (2)
ProductVersionsFixed in
mozilla/firefox< 157.0.0157.0.0
mozilla/thunderbird< 157.0157.0
References (3)
https://bugzilla.mozilla.org/show_bug.cgi?id=2061290 · [email protected]https://www.mozilla.org/security/advisories/mfsa2026-101/ · [email protected]https://www.mozilla.org/security/advisories/mfsa2026-97/ · [email protected]
EPSS history
Timeline
  • 01 OCT 03:44Z
    EPSS moved — → 0%
    epss
  • 29 SEP 12:35Z
    Privilege escalation due to incorrect boundary conditions in the Graphics: WebGPU component
    cvelistv5