CVE-2026-100799CWE-457

CVE-2026-100799

Medium · published September 29, 2026

CVSS v3.1
4.3
EPSS
0%
Percentile
14.4
In the wild
Unconfirmed
What it is

Uninitialized memory in the Graphics: WebGPU component. This vulnerability was fixed in Thunderbird 157 and Firefox 157.

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:N/I:N/A:L
CVSS v4.0
Not supplied
EPSS
0.00241 · 14.4th percentile
Weakness
CWE-457 · Use of Uninitialized Variable
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=2056217 · [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 12:36Z
    Uninitialized memory in the Graphics: WebGPU component
    cvelistv5