CVE-2026-84131
published 2026-09-01CVE-2026-84131: Privilege escalation due to invalid pointer in the Graphics component. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15…
PriorityP348high8.8CVSS 3.1
AVNACLPRNUIRSUCHIHAH
Privilege escalation due to invalid pointer in the Graphics component. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, Firefox ESR 153.2, Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2.
Affected
8 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| mozilla | firefox | < Firefox 155 | Firefox 155 |
| mozilla | firefox | — | — |
| mozilla | firefox_esr | < Firefox ESR 115.40 | Firefox ESR 115.40 |
| mozilla | firefox_esr | < Firefox ESR 153.2 | Firefox ESR 153.2 |
| mozilla | firefox_esr | < Firefox ESR 140.15 | Firefox ESR 140.15 |
| mozilla | thunderbird | < Thunderbird 153.2 | Thunderbird 153.2 |
| mozilla | thunderbird | < Thunderbird 155 | Thunderbird 155 |
| mozilla | thunderbird | < Thunderbird 140.15 | Thunderbird 140.15 |
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: firefox-esr: Firefox: Privilege escalation in Graphics component
vendor_redhat·2026-09-01·CVSS 8.8
CVE-2026-84131 [HIGH] CWE-825 firefox: firefox-esr: Firefox: Privilege escalation in Graphics component
firefox: firefox-esr: Firefox: Privilege escalation in Graphics component
A flaw was found in the Graphics component of Firefox. An invalid pointer could allow a local attacker to escalate privileges. This could lead to unauthorized access to sensitive system resources or execution of arbitrary code with elevated permissions.
Package: firefox (Red Hat Enterprise Linux 10) - Affected
Package: firefox (Red Hat Enterprise Linux 7) - Affected
Package: firefox (Red Hat Enterprise Linux 8) - Affected
Package: firefox (Red Hat Enterprise Linux 9) - Affected
Mozilla
Mozilla Foundation Security Advisory 2026-88: CVE-2026-84131
vendor_mozilla·CVSS 8.8
CVE-2026-84131 [HIGH] Mozilla Foundation Security Advisory 2026-88: CVE-2026-84131
Mozilla Foundation Security Advisory 2026-88
CVE: CVE-2026-84131
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 153.2
Mozilla
Mozilla Foundation Security Advisory 2026-82: CVE-2026-84131
vendor_mozilla·CVSS 8.8
CVE-2026-84131 [HIGH] Mozilla Foundation Security Advisory 2026-82: CVE-2026-84131
Mozilla Foundation Security Advisory 2026-82
CVE: CVE-2026-84131
Product: Firefox
Impact: high
Fixed in: Firefox 155
Mozilla
Mozilla Foundation Security Advisory 2026-86: CVE-2026-84131
vendor_mozilla·CVSS 8.8
CVE-2026-84131 [HIGH] Mozilla Foundation Security Advisory 2026-86: CVE-2026-84131
Mozilla Foundation Security Advisory 2026-86
CVE: CVE-2026-84131
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 155
Mozilla
Mozilla Foundation Security Advisory 2026-83: CVE-2026-84131
vendor_mozilla·CVSS 8.8
CVE-2026-84131 [HIGH] Mozilla Foundation Security Advisory 2026-83: CVE-2026-84131
Mozilla Foundation Security Advisory 2026-83
CVE: CVE-2026-84131
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 115.40
Mozilla
Mozilla Foundation Security Advisory 2026-85: CVE-2026-84131
vendor_mozilla·CVSS 8.8
CVE-2026-84131 [HIGH] Mozilla Foundation Security Advisory 2026-85: CVE-2026-84131
Mozilla Foundation Security Advisory 2026-85
CVE: CVE-2026-84131
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 153.2
Mozilla
Mozilla Foundation Security Advisory 2026-84: CVE-2026-84131
vendor_mozilla·CVSS 8.8
CVE-2026-84131 [HIGH] Mozilla Foundation Security Advisory 2026-84: CVE-2026-84131
Mozilla Foundation Security Advisory 2026-84
CVE: CVE-2026-84131
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 140.15
Mozilla
Mozilla Foundation Security Advisory 2026-87: CVE-2026-84131
vendor_mozilla·CVSS 8.8
CVE-2026-84131 [HIGH] Mozilla Foundation Security Advisory 2026-87: CVE-2026-84131
Mozilla Foundation Security Advisory 2026-87
CVE: CVE-2026-84131
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 140.15
GHSA
Privilege escalation due to invalid pointer in the Graphics component.
ghsa_unreviewed·2026-09-01
CVE-2026-84131 [HIGH] CWE-763 Privilege escalation due to invalid pointer in the Graphics component.
Privilege escalation due to invalid pointer in the Graphics component. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, and Firefox ESR 153.2.
No detection rules found.
No public exploits indexed.
https://bugzilla.mozilla.org/show_bug.cgi?id=2060008https://www.mozilla.org/security/advisories/mfsa2026-82/https://www.mozilla.org/security/advisories/mfsa2026-83/https://www.mozilla.org/security/advisories/mfsa2026-84/https://www.mozilla.org/security/advisories/mfsa2026-85/https://www.mozilla.org/security/advisories/mfsa2026-86/https://www.mozilla.org/security/advisories/mfsa2026-87/https://www.mozilla.org/security/advisories/mfsa2026-88/
2026-09-01
Published