CVE-2026-84118: Vulnerability in Mozilla Firefox
Use-after-free in the JavaScript: GC component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, and Thunderbird 155.
CVE-2026-84118: Vulnerability in Mozilla Firefox
Description
Use-after-free in the JavaScript: GC component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, and Thunderbird 155.
CVSS v3.1
Score 5.4medium
Weaknesses
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-09-01T07:25:03.410Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-82/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-85/","vendor":"Mozilla"}]
Threat ID: 6a96caaeacd9273b49b6851c
Added to database: 09/01/2026, 12:53:02 UTC
Last updated: 09/02/2026, 02:09:45 UTC
Views: 10
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