CVE-2026-109776

MediumCVSS 4.2/10Last modified Oct 15, 2026

Description

Race condition in the XPCOM component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.

Metrics

CVSS 3.1 4.2/10CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N

Weakness enumeration

CWE-362

Affected software

VendorProductVersions
MozillaFirefox—
MozillaThunderbird—

References

Timeline

Published
Oct 13, 2026
Last modified
Oct 15, 2026
NVD status
Deferred

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