CVE-2018-8556: ChakraCore RCE Vulnerability in Microsoft.ChakraCore
Summary
CVE-2018-8556: ChakraCore RCE Vulnerability. Affects Microsoft.ChakraCore versions < 1.11.3. Fixed in 1.11.3. How to fix ↓
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Background
Microsoft.ChakraCore is an open-source JavaScript engine that powers Microsoft Edge. It is responsible for executing JavaScript code in the browser and provides support for various web standards. ChakraCore is widely used in web browsers and other applications that require JavaScript execution capabilities. However, a remote code execution vulnerability has been discovered in ChakraCore, which affects Microsoft Edge as well. This vulnerability, known as 'Chakra Scripting Engine Memory Corruption Vulnerability' (CVE-2018-8556), allows an attacker to execute arbitrary code on a target system by exploiting the way ChakraCore handles objects in memory.
Vulnerability Detail
The Chakra Scripting Engine Memory Corruption Vulnerability (CVE-2018-8556) is a remote code execution vulnerability that exists in the Chakra scripting engine used by Microsoft Edge. By manipulating objects in memory, an attacker can exploit this vulnerability to execute arbitrary code on a target system. This can lead to various consequences, including unauthorized access, data theft, and system compromise. The vulnerability has a CVSS score of 7.5, indicating a high severity level.
How To Fix
Latest published version: 1.11.24 as of 22 Oct 2026
Upgrading to it may include breaking changes; the version below is the minimum fixed release for this vulnerability.
If you need the minimum change
1.11.3
This is the first release that contains the fix.
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Workaround
There is no specific workaround provided for this vulnerability. However, applying the recommended fix by updating the Microsoft.ChakraCore package to the latest version will effectively address the issue.
Conclusion
The Chakra Scripting Engine Memory Corruption Vulnerability (CVE-2018-8556) is a critical remote code execution vulnerability in the Microsoft.ChakraCore package. It affects Microsoft Edge and other applications that use the ChakraCore JavaScript engine. To mitigate this vulnerability, it is crucial to update the package to version 1.11.3 or later. For further support and assistance in vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for Microsoft.ChakraCore →
FAQ
The vulnerability allows an attacker to execute arbitrary code on a target system, potentially leading to unauthorized access, data theft, and system compromise.
The vulnerability affects Microsoft Edge and applications that use the ChakraCore JavaScript engine.
There is no specific information available about known exploits for this vulnerability at the moment.
No, updating the Microsoft.ChakraCore package to the latest version is the recommended mitigation for this vulnerability.
You can find more information about this vulnerability in the CVE-2018-8556 advisory and the GitHub advisory database.
References
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