CVE-2026-100799mediumCWE-457

CVE-2026-100799: medium-severity vulnerability in Mozilla Thunderbird

Uninitialized memory in the Graphics: WebGPU component

Published · Updated

13Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 4.3epss 0.3%
exploitation probability
0.3%top 84% of all CVEs
observed exploitation
nono source reports it
Uninitialized memory in the Graphics: WebGPU component. This vulnerability was fixed in Thunderbird 157 and Firefox 157.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Affected products
Mozilla · FirefoxMozilla · Thunderbird
Related CVEs — Mozilla Thunderbird

In the same product, most dangerous first.

CVE-2016-9079HIGHCVE-2016-9079EPSS 87.5%KEVCVE-2019-11708CRITICALCVE-2019-11708EPSS 55.9%KEVCVE-2019-17026HIGHCVE-2019-17026EPSS 46.3%KEVCVE-2019-11707HIGHCVE-2019-11707EPSS 37.7%KEVCVE-2024-9680CRITICALCVE-2024-9680EPSS 23.2%KEVCVE-2022-26485HIGHCVE-2022-26485EPSS 14.3%KEV
References
https://bugzilla.mozilla.org/show_bug.cgi?id=2056217https://www.mozilla.org/security/advisories/mfsa2026-101/https://www.mozilla.org/security/advisories/mfsa2026-97/