CVE-2020-8215: Buffer overflow in canvas
Summary
CVE-2020-8215: Buffer overflow in canvas. Affects canvas versions < 1.6.11. Fixed in 1.6.11. How to fix ↓
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Background
The canvas package is an npm package that provides a JavaScript implementation of the HTML5 canvas element. It allows developers to draw graphics, animations, and images on a web page using JavaScript. The canvas package is widely used in web development projects to create interactive and visually appealing applications. However, versions of the canvas package before 1.6.11 are vulnerable to a buffer overflow. This vulnerability can be exploited by an attacker to cause a Denial of Service or execute arbitrary code when processing a user-provided image.
Vulnerability Detail
The buffer overflow vulnerability in the canvas package arises from a lack of proper input validation and boundary checks when processing user-provided images. An attacker can craft a malicious image that triggers the buffer overflow, leading to a crash of the application or potential execution of arbitrary code. This can result in a complete compromise of the affected system, allowing the attacker to gain unauthorized access, steal sensitive information, or perform other malicious activities. The vulnerability has a CVSS score of 8.8, indicating a high severity level.
How To Fix
Latest published version: 3.2.3 as of 23 Oct 2026
npm install canvas@3.2.3Upgrading to it may include breaking changes; the version below is the minimum fixed release for this vulnerability.
If you need the minimum change
1.6.11
This is the first release that contains the fix.
npm install canvas@1.6.11Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Conclusion
The canvas package is vulnerable to a buffer overflow, which can result in a Denial of Service or execution of arbitrary code. It is crucial for developers to upgrade to version 1.6.11 or later to mitigate this vulnerability. For further assistance and support in vulnerability remediation, please contact DevNack.com.
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FAQ
The canvas package is an npm package that provides a JavaScript implementation of the HTML5 canvas element. It is used for drawing graphics, animations, and images on web pages.
A buffer overflow is a vulnerability that occurs when a program writes data beyond the boundaries of a buffer, causing memory corruption and potentially allowing an attacker to execute arbitrary code.
The buffer overflow in the canvas package can be exploited by crafting a malicious image that triggers the overflow when processed by the package. This can lead to a crash of the application or execution of arbitrary code.
The potential consequences of this vulnerability include a Denial of Service, unauthorized access to the affected system, theft of sensitive information, and execution of arbitrary code.
Yes, the vulnerability can be fixed by upgrading the canvas package to version 1.6.11 or later.
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