CVE-2026-92023

HighCVSS 8.8/10Last modified Oct 6, 2026

Description

Use-after-free in the XML component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.

Metrics

CVSS 3.1 8.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-416

Affected software

VendorProductVersions
MozillaFirefox—
MozillaThunderbird—

References

Timeline

Published
Sep 15, 2026
Last modified
Oct 6, 2026
NVD status
Analyzed

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CVE-2026-92023: High severity, CVSS 8.8 | Vulnix