CVE-2026-100799: Uninitialized memory in the Graphics: WebGPU component

Medium severity · published Sep 29, 2026

CVE-2026-100799

Uninitialized memory in the Graphics: WebGPU component

4.3

CVSS

0.2%

EPSS

On KEV

Description

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

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

Attack vector

Network

Complexity

Low

Privileges

None

User interaction

Required

Confidentiality

None

Integrity

None

Availability

Low

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)0.2% · higher than 15% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

Firefox · Mozilla

before 157.0.0 · source: NVD

Thunderbird · Mozilla

before 157.0 · source: NVD

Affected product

Firefox

Mozilla

All Firefox CVEs

References

NVD

https://nvd.nist.gov/vuln/detail/CVE-2026-100799

CVE.org

https://www.cve.org/CVERecord?id=CVE-2026-100799

bugzilla.mozilla.org

https://bugzilla.mozilla.org/show_bug.cgi?id=2056217

www.mozilla.org

https://www.mozilla.org/security/advisories/mfsa2026-101/

www.mozilla.org

https://www.mozilla.org/security/advisories/mfsa2026-97/