HarborGuard / CVE
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HIGHCVE-2026-6754Published Modified CNA mozilla

CVE-2026-6754: Use-after-free in the JavaScript Engine component

Use-after-free in the JavaScript Engine component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

Metrics

CVSS v3.1
7.5
Severity
HIGH
Fixed in
115.35
Affected Products
2

Fix available

115.35140.10150
Affected packages
  • Mozilla / Firefox
    Fixed in 115.35, 140.10, 150
  • Mozilla / Thunderbird
    Fixed in 140.10, 150
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References