Firefox CanvasWebGL OOB Boundary Condition Vulnerability
CVE-2026-124852 Published on November 10, 2026
Incorrect boundary conditions in the Graphics: CanvasWebGL component
Incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 160.
Vulnerability Analysis
CVE-2026-124852 is exploitable with network access, requires user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.
Weakness Type
What is a Classic Buffer Overflow Vulnerability?
The program copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. A buffer overflow condition exists when a program attempts to put more data in a buffer than it can hold, or when a program attempts to put data in a memory area outside of the boundaries of a buffer. The simplest type of error, and the most common cause of buffer overflows, is the "classic" case in which the program copies the buffer without restricting how much is copied. Other variants exist, but the existence of a classic overflow strongly suggests that the programmer is not considering even the most basic of security protections.
CVE-2026-124852 has been classified to as a Classic Buffer Overflow vulnerability or weakness.
Products Associated with CVE-2026-124852
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Affected Versions
Mozilla Firefox:- Version 160, <= * is unaffected.