CVE-2026-92066
published 2026-09-15CVE-2026-92066: Sandbox escape in the Profile Backup component. This vulnerability was fixed in Firefox 156 and Thunderbird 156.
PriorityP351critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EPSS
0.55%
45.0th percentile
Sandbox escape in the Profile Backup component. This vulnerability was fixed in Firefox 156 and Thunderbird 156.
Affected
4 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| mozilla | firefox | < Firefox 156 | Firefox 156 |
| mozilla | firefox | < 156.0.0 | 156.0.0 |
| mozilla | thunderbird | < Thunderbird 156 | Thunderbird 156 |
| mozilla | thunderbird | < 156.0 | 156.0 |
CVSS provenance
nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
vendor_redhat3.4LOW
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Red Hat
firefox: thunderbird: Sandbox escape in the Profile Backup component
vendor_redhat·2026-09-15·CVSS 3.4
CVE-2026-92066 [LOW] CWE-653 firefox: thunderbird: Sandbox escape in the Profile Backup component
firefox: thunderbird: Sandbox escape in the Profile Backup component
Sandbox escape in the Profile Backup component. This vulnerability was fixed in Firefox 156 and Thunderbird 156.
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue:
Sandbox escape in the Profile Backup component
Statement: Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.
Package: firefox (Red Hat Enterprise Linux 10) - Not affected
Package: rhel10/firefox-flatpak (Red Hat Enterprise Linux 10) - Not affected
Package: rhel10/thunderbird-flatpak (Red Hat Enterprise Linux 10) - Not affected
Package: thunderbird (Red Hat Enterprise Linux 10) - Not affected
Package: firefox (Red Hat Enter
Mozilla
Mozilla Foundation Security Advisory 2026-90: CVE-2026-92066
vendor_mozilla
CVE-2026-92066 Mozilla Foundation Security Advisory 2026-90: CVE-2026-92066
Mozilla Foundation Security Advisory 2026-90
CVE: CVE-2026-92066
Product: Firefox
Impact: low
Fixed in: Firefox 156
Mozilla
Mozilla Foundation Security Advisory 2026-94: CVE-2026-92066
vendor_mozilla
CVE-2026-92066 Mozilla Foundation Security Advisory 2026-94: CVE-2026-92066
Mozilla Foundation Security Advisory 2026-94
CVE: CVE-2026-92066
Product: Thunderbird
Impact: low
Fixed in: Thunderbird 156
GHSA
Sandbox escape in the Profile Backup component.
ghsa_unreviewed·2026-09-15
CVE-2026-92066 Sandbox escape in the Profile Backup component.
Sandbox escape in the Profile Backup component. This vulnerability was fixed in Firefox 156.
No detection rules found.
No public exploits indexed.
2026-09-15
Published