Vulnerability · NVD

CVE-2026-124864

CVE-2026-124864, critical severity (CVSS 9.6): 2 tracked apps concerned, all fixed or indeterminable on their current version.

Severity (CVSS): 9.6
Exploitation: -
Tracked apps: 2
Still exposed: 0

Published on 2026-11-10

Sandbox escape due to use-after-free in the DOM: Service Workers component. This vulnerability was fixed in Firefox 160, Firefox ESR 115.45, Firefox ESR 153.7, Thunderbird 160, and Thunderbird 153.7.

Attack vector : Network No privileges required

Show raw CVSS vector

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

Tracked apps referencing this CVE

For each app: the affected range, the fixing version, and where the tracked app stands today.

Mozilla Firefox Windows winget:Mozilla.Firefox

Affected <160 Fixed in 160 Latest tracked 160.0 patched

Observed affected builds (184)

159.0.1 159.0 158.0.1 158.0 157.0.1 157.0 156.0.1 156.0 155.0.1 155.0 154.0.1 154.0 153.0.4 153.0.3 153.0.1 153.0 152.0.6 152.0.5 152.0.4 152.0.3 152.0.2 152.0.1 152.0 151.0.4 151.0.3 151.0.2 151.0.1 151.0 150.0.3 150.0.2 +154 · see history
Mozilla Thunderbird Windows winget:Mozilla.Thunderbird

Affected <160 Fixed in 160 Latest tracked 160.0 patched

Observed affected builds (138)

159.0 158.0.1 158.0 157.0.1 157.0 156.0.1 156.0 155.0.1 155.0 154.0 153.0.3 153.0.2 153.0.1 153.0 152.0.1 152.0 151.0.1 151.0 150.0.2 150.0.1 150.0 149.0.2 149.0.1 149.0 148.0.1 148.0 147.0.2 147.0.1 147.0 146.0.1 +108 · see history

Vulnerable CPE configurations (2)

Vendor	Product	Platform	Versions	CPE 2.3 URI
mozilla	firefox All platforms (wildcard)	All platforms (wildcard)	<160	cpe:2.3:a:mozilla:firefox::::::::
mozilla	thunderbird All platforms (wildcard)	All platforms (wildcard)	<160	cpe:2.3:a:mozilla:thunderbird::::::::

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