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CVE-2026-74938

nvd nist
Published: Aug 18, 2026Modified: Aug 19, 2026

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9.1
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Exploitability: 3.9 / Impact: 5.2
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

Description

Mitigation bypass in the JavaScript: GC component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.

Affected (4)

Mozilla
2 products
Firefox
Thunderbird
Configuration A
4 vulnerable
Vulnerable SoftwareAffected Versions
Mozilla
Firefox
Before 154.0.0
Firefox
Before 153.1.0
Mozilla
Thunderbird
Before 154.0
Thunderbird
Before 153.1.0

Related CWEs

CWE-693
Protection Mechanism Failure
The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product.

References (5)

Source: security@mozilla.org
Permissions Required
Source: security@mozilla.org
Vendor Advisory
Source: security@mozilla.org
Vendor Advisory
Source: security@mozilla.org
Vendor Advisory
Source: security@mozilla.org
Vendor Advisory

Timeline

No history available yet.