CVE details

CVE-2026-84121

Sandbox escape due to use-after-free in the DOM: Security component

• Severity: High
• CVSS: N/A
• Published: 2026-09-01
• Fixed in: 155

Description

Sandbox escape due to use-after-free in the DOM: Security component

Affected products

• Firefox · → 155
• Firefox · → 115.40.0
• Firefox · 116.0 → 140.15.0
• Firefox · 141.0.0 → 153.2.0
• Firefox · 154.0.0 → 155.0.0

Overlaps: Firefox

Source

View on NVD

Check if your browser is affected