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Mozilla CVE-2026-92009

| EUVDEUVD-2026-78472 HIGH
Classic Buffer Overflow (CWE-120)
2026-09-15 mozilla GHSA-7p38-76rq-878j
Privilege Escalation Buffer Overflow Mozilla
8.8
CVSS 3.1 · Vendor: mozilla
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Severity by source

Vendor (mozilla) PRIMARY
8.8 HIGH
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Primary rating from Vendor (mozilla) · only source for this CVE.

CVSS VectorVendor: mozilla

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

3
Analysis Generated
Sep 15, 2026 - 15:26 vuln.today
CVE Published
Sep 15, 2026 - 12:33 cve.org
UNKNOWN (no severity yet)
CVE Published
Sep 15, 2026 - 12:33 cve.org
HIGH 8.8

DescriptionCVE.org

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.

Articles & Coverage 1

News We need answer only title. Need generate concise article title per format. Product Mozilla, total 19, severity HIGH all 19, POC 0. Format "N New [Product] Vulnerabilities - X Critical, Y With POC". But severity is HIGH not Critical. Examples allow variations. Need max 100 chars. Should we say "19 New Mozilla Vulnerabilities - 19 High Severity, 0 With POC"? That's 59? Let's count: "19 New Mozilla Vulnerabilities - 19 High Severity, 0 With POC Sep 15, 2026

AnalysisAI

An out-of-bounds write in Firefox's Graphics: CanvasWebGL component lets a malicious web page corrupt memory and gain elevated privileges on the host, affecting Firefox builds prior to 156 and the ESR branches prior to 115.41, 140.16, and 153.3. Exploitation is remote but requires the victim to load attacker-controlled WebGL/Canvas content (CVSS UI:R), so it is not automatable and no public exploit code or active exploitation has been identified at time of analysis. …

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CVE-2026-92009 vulnerability details – vuln.today
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