CVE-2026-92054
published 2026-09-15CVE-2026-92054: Privilege escalation in the Memory component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
PriorityP344high8.8CVSS 3.1
AVNACLPRNUIRSUCHIHAH
EPSS
0.24%
14.5th percentile
Privilege escalation in the Memory component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
Affected
8 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| mozilla | firefox | < Firefox 156 | Firefox 156 |
| mozilla | firefox | < 153.3.0 | 153.3.0 |
| mozilla | firefox | >= 154.0.0 < 156.0.0 | 156.0.0 |
| mozilla | firefox_esr | < Firefox ESR 153.3 | Firefox ESR 153.3 |
| mozilla | thunderbird | < Thunderbird 156 | Thunderbird 156 |
| mozilla | thunderbird | < Thunderbird 153.3 | Thunderbird 153.3 |
| mozilla | thunderbird | < 153.3.0 | 153.3.0 |
| mozilla | thunderbird | >= 154.0 < 156.0 | 156.0 |
CVSS provenance
nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
vendor_redhat8.8HIGH
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Red Hat
firefox: thunderbird: Privilege escalation in the Memory component
vendor_redhat·2026-09-15·CVSS 8.8
CVE-2026-92054 [HIGH] CWE-825 firefox: thunderbird: Privilege escalation in the Memory component
firefox: thunderbird: Privilege escalation in the Memory component
Privilege escalation in the Memory component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue:
Privilege escalation in the Memory 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
Mozilla
Mozilla Foundation Security Advisory 2026-93: CVE-2026-92054
vendor_mozilla·CVSS 8.8
CVE-2026-92054 [HIGH] Mozilla Foundation Security Advisory 2026-93: CVE-2026-92054
Mozilla Foundation Security Advisory 2026-93
CVE: CVE-2026-92054
Product: Firefox ESR
Impact: low
Fixed in: Firefox ESR 153.3
Mozilla
Mozilla Foundation Security Advisory 2026-94: CVE-2026-92054
vendor_mozilla·CVSS 8.8
CVE-2026-92054 [HIGH] Mozilla Foundation Security Advisory 2026-94: CVE-2026-92054
Mozilla Foundation Security Advisory 2026-94
CVE: CVE-2026-92054
Product: Thunderbird
Impact: low
Fixed in: Thunderbird 156
Mozilla
Mozilla Foundation Security Advisory 2026-90: CVE-2026-92054
vendor_mozilla·CVSS 8.8
CVE-2026-92054 [HIGH] Mozilla Foundation Security Advisory 2026-90: CVE-2026-92054
Mozilla Foundation Security Advisory 2026-90
CVE: CVE-2026-92054
Product: Firefox
Impact: low
Fixed in: Firefox 156
Mozilla
Mozilla Foundation Security Advisory 2026-96: CVE-2026-92054
vendor_mozilla·CVSS 8.8
CVE-2026-92054 [HIGH] Mozilla Foundation Security Advisory 2026-96: CVE-2026-92054
Mozilla Foundation Security Advisory 2026-96
CVE: CVE-2026-92054
Product: Thunderbird
Impact: low
Fixed in: Thunderbird 153.3
GHSA
Privilege escalation in the Memory component.
ghsa_unreviewed·2026-09-15
CVE-2026-92054 [HIGH] CWE-119 Privilege escalation in the Memory component.
Privilege escalation in the Memory component. This vulnerability was fixed in Firefox 156 and Firefox ESR 153.3.
No detection rules found.
No public exploits indexed.
2026-09-15
Published