CVE-2026-100763CWE-119

CVE-2026-100763

Critical · published September 29, 2026

CVSS v3.1
9.1
EPSS
0%
Percentile
30.3
In the wild
Unconfirmed
What it is

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
9.1 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00375 · 30.3th 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=2059929 · [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
    Incorrect boundary conditions in the Graphics: WebGPU component
    cvelistv5