CVE-2026-92052
published 2026-09-15CVE-2026-92052: Privilege escalation due to uninitialized memory in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3…
PriorityP344high8.8CVSS 3.1
AVNACLPRNUIRSUCHIHAH
EPSS
0.24%
14.0th percentile
Privilege escalation due to uninitialized memory in the Graphics: CanvasWebGL 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 due to uninitialized memory in the Graphics: CanvasWebGL component
vendor_redhat·2026-09-15·CVSS 8.8
CVE-2026-92052 [HIGH] CWE-824 firefox: thunderbird: Privilege escalation due to uninitialized memory in the Graphics: CanvasWebGL component
firefox: thunderbird: Privilege escalation due to uninitialized memory in the Graphics: CanvasWebGL component
Privilege escalation due to uninitialized memory in the Graphics: CanvasWebGL 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 due to uninitialized memory in the Graphics: CanvasWebGL 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/th
Mozilla
Mozilla Foundation Security Advisory 2026-94: CVE-2026-92052
vendor_mozilla·CVSS 8.8
CVE-2026-92052 [HIGH] Mozilla Foundation Security Advisory 2026-94: CVE-2026-92052
Mozilla Foundation Security Advisory 2026-94
CVE: CVE-2026-92052
Product: Thunderbird
Impact: low
Fixed in: Thunderbird 156
Mozilla
Mozilla Foundation Security Advisory 2026-93: CVE-2026-92052
vendor_mozilla·CVSS 8.8
CVE-2026-92052 [HIGH] Mozilla Foundation Security Advisory 2026-93: CVE-2026-92052
Mozilla Foundation Security Advisory 2026-93
CVE: CVE-2026-92052
Product: Firefox ESR
Impact: low
Fixed in: Firefox ESR 153.3
Mozilla
Mozilla Foundation Security Advisory 2026-96: CVE-2026-92052
vendor_mozilla·CVSS 8.8
CVE-2026-92052 [HIGH] Mozilla Foundation Security Advisory 2026-96: CVE-2026-92052
Mozilla Foundation Security Advisory 2026-96
CVE: CVE-2026-92052
Product: Thunderbird
Impact: low
Fixed in: Thunderbird 153.3
Mozilla
Mozilla Foundation Security Advisory 2026-90: CVE-2026-92052
vendor_mozilla·CVSS 8.8
CVE-2026-92052 [HIGH] Mozilla Foundation Security Advisory 2026-90: CVE-2026-92052
Mozilla Foundation Security Advisory 2026-90
CVE: CVE-2026-92052
Product: Firefox
Impact: low
Fixed in: Firefox 156
GHSA
Privilege escalation due to uninitialized memory in the Graphics: CanvasWebGL component.
ghsa_unreviewed·2026-09-15
CVE-2026-92052 [HIGH] CWE-457 Privilege escalation due to uninitialized memory in the Graphics: CanvasWebGL component.
Privilege escalation due to uninitialized memory in the Graphics: CanvasWebGL 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