CVE-2026-92010

What it is

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.

At a glance

Exploitability

Can be exploited over the network without logging in, but needs a user to act. High risk of data exposure, data tampering, service disruption.

Exploit odds

0.3% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2026-09-15 13:16 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-10-06 14:47 UTC Last updatedMost recent change to the record

Details

Published

2026-09-15 13:16 UTC

Last modified

2026-10-06 14:47 UTC

Exploit probability

0.3% · EPSS, next 30 days

Weakness

CWE-120 · Classic buffer overflow

Record status

Analyzed

Affected

• Mozilla Firefox < 115.41.0
• Mozilla Firefox < 140.16.0
• Mozilla Firefox < 153.3.0
• Mozilla Firefox < 156.0.0
• Mozilla Thunderbird < 140.16.0
• Mozilla Thunderbird < 153.3.0
• Mozilla Thunderbird < 156.0

Attack profile CVSS 3.1 · 8.8

Attack vector

Network

Complexity

Low

Privileges needed

None

User interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High