CVE-2026-92006
published 2026-09-15CVE-2026-92006: Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 156, Firefox ESR…
PriorityP346high8.8CVSS 3.1
AVNACLPRNUIRSUCHIHAH
EPSS
0.33%
24.4th percentile
Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.
Affected
18 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| mozilla | firefox | < Firefox 156 | Firefox 156 |
| mozilla | firefox | < 115.41.0 | 115.41.0 |
| mozilla | firefox | — | — |
| mozilla | firefox | >= 116.0 < 140.16.0 | 140.16.0 |
| mozilla | firefox | >= 141.0 < 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 | firefox_esr | < Firefox ESR 140.16 | Firefox ESR 140.16 |
| mozilla | firefox_esr | < Firefox ESR 115.41 | Firefox ESR 115.41 |
| mozilla | thunderbird | < Thunderbird 153.3 | Thunderbird 153.3 |
| mozilla | thunderbird | < Thunderbird 140.16 | Thunderbird 140.16 |
| mozilla | thunderbird | < Thunderbird 156 | Thunderbird 156 |
| mozilla | thunderbird | < 140.16.0 | 140.16.0 |
| mozilla | thunderbird | — | — |
| mozilla | thunderbird | >= 141.0 < 153.3.0 | 153.3.0 |
| mozilla | thunderbird | >= 154.0 < 156.0 | 156.0 |
| rhel10 | firefox-flatpak | — | — |
| rhel10 | thunderbird-flatpak | — | — |
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
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
Red Hat
firefox: thunderbird: Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component
vendor_redhat·2026-09-15·CVSS 8.8
CVE-2026-92006 [HIGH] CWE-653 firefox: thunderbird: Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component
firefox: thunderbird: Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component
Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16, 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 incorrect boundary conditions 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) - Affected
Package: rhel
Mozilla
Mozilla Foundation Security Advisory 2026-96: CVE-2026-92006
vendor_mozilla·CVSS 8.8
CVE-2026-92006 [HIGH] Mozilla Foundation Security Advisory 2026-96: CVE-2026-92006
Mozilla Foundation Security Advisory 2026-96
CVE: CVE-2026-92006
Product: Thunderbird
Impact: low
Fixed in: Thunderbird 153.3
Mozilla
Mozilla Foundation Security Advisory 2026-93: CVE-2026-92006
vendor_mozilla·CVSS 8.8
CVE-2026-92006 [HIGH] Mozilla Foundation Security Advisory 2026-93: CVE-2026-92006
Mozilla Foundation Security Advisory 2026-93
CVE: CVE-2026-92006
Product: Firefox ESR
Impact: low
Fixed in: Firefox ESR 153.3
Mozilla
Mozilla Foundation Security Advisory 2026-95: CVE-2026-92006
vendor_mozilla·CVSS 8.8
CVE-2026-92006 [HIGH] Mozilla Foundation Security Advisory 2026-95: CVE-2026-92006
Mozilla Foundation Security Advisory 2026-95
CVE: CVE-2026-92006
Product: Thunderbird
Impact: moderate
Fixed in: Thunderbird 140.16
Mozilla
Mozilla Foundation Security Advisory 2026-94: CVE-2026-92006
vendor_mozilla·CVSS 8.8
CVE-2026-92006 [HIGH] Mozilla Foundation Security Advisory 2026-94: CVE-2026-92006
Mozilla Foundation Security Advisory 2026-94
CVE: CVE-2026-92006
Product: Thunderbird
Impact: low
Fixed in: Thunderbird 156
Mozilla
Mozilla Foundation Security Advisory 2026-92: CVE-2026-92006
vendor_mozilla·CVSS 8.8
CVE-2026-92006 [HIGH] Mozilla Foundation Security Advisory 2026-92: CVE-2026-92006
Mozilla Foundation Security Advisory 2026-92
CVE: CVE-2026-92006
Product: Firefox ESR
Impact: moderate
Fixed in: Firefox ESR 140.16
Mozilla
Mozilla Foundation Security Advisory 2026-90: CVE-2026-92006
vendor_mozilla·CVSS 8.8
CVE-2026-92006 [HIGH] Mozilla Foundation Security Advisory 2026-90: CVE-2026-92006
Mozilla Foundation Security Advisory 2026-90
CVE: CVE-2026-92006
Product: Firefox
Impact: low
Fixed in: Firefox 156
Mozilla
Mozilla Foundation Security Advisory 2026-91: CVE-2026-92006
vendor_mozilla·CVSS 8.8
CVE-2026-92006 [HIGH] Mozilla Foundation Security Advisory 2026-91: CVE-2026-92006
Mozilla Foundation Security Advisory 2026-91
CVE: CVE-2026-92006
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 115.41
VulDB
Mozilla Firefox up to 115.40/140.15/153.2/155 CanvasWebGL privileges management (Nessus ID 345908)
vuldb·2026-09-16·CVSS 8.8
CVE-2026-92006 [HIGH] Mozilla Firefox up to 115.40/140.15/153.2/155 CanvasWebGL privileges management (Nessus ID 345908)
A vulnerability classified as critical has been found in Mozilla Firefox up to 115.40/140.15/153.2/155. Affected by this vulnerability is an unknown functionality of the component CanvasWebGL. Performing a manipulation results in improper privilege management.
This vulnerability is identified as CVE-2026-92006. The attack can be initiated remotely. There is not any exploit available.
It is recommended to upgrade the affected component.
GHSA
Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component.
ghsa_unreviewed·2026-09-15
CVE-2026-92006 [HIGH] CWE-120 Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component.
Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, and Firefox ESR 153.3.
No detection rules found.
No public exploits indexed.
https://bugzilla.mozilla.org/show_bug.cgi?id=2057121https://www.mozilla.org/security/advisories/mfsa2026-90/https://www.mozilla.org/security/advisories/mfsa2026-91/https://www.mozilla.org/security/advisories/mfsa2026-92/https://www.mozilla.org/security/advisories/mfsa2026-93/https://www.mozilla.org/security/advisories/mfsa2026-94/https://www.mozilla.org/security/advisories/mfsa2026-95/https://www.mozilla.org/security/advisories/mfsa2026-96/
2026-09-15
Published