CVE-2018-8227

ChakraCore RCE Vulnerability

7.5 HighFix available

A remote code execution vulnerability exists in the way that the Chakra scripting engine handles objects in memory in Microsoft Edge, aka "Chakra Scripting Engine Memory Corruption Vulnerability." This affects Microsoft Edge, ChakraCore. This CVE ID is unique from CVE-2018-8229.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: High
Privileges needed: None
User interaction: Required

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

16.9%Up 2.1 points since Apr 14, 2021

What each source reports

NVD Score used 7.5

Record: CVE-2018-8227
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 2.0: 7.6 HighAV:N/AC:H/Au:N/C:C/I:C/A:C
Weakness: CWE-787
Updated: 2026-11-02

CVE List No score

Record: CVE-2018-8227
Updated: 2026-11-02

EUVDEUVD-2022-3992 No score

Record: EUVD-2022-3992
Updated: 2026-11-03

GitHub AdvisoriesGHSA-gqh4-4r89-pr95 7.5

ChakraCore RCE Vulnerability

Record: GHSA-gqh4-4r89-pr95
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness: CWE-787
Updated: 2026-11-02

OSV 7.5

Record: CVE-2018-8227
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVGHSA-gqh4-4r89-pr95 7.5

ChakraCore RCE Vulnerability

Record: GHSA-gqh4-4r89-pr95
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness: CWE-787
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`Microsoft.ChakraCore` NuGet	before 1.8.5	1.8.5
`Microsoft.ChakraCore` NuGet	before 1.8.5, plus listed versions 1.2.01.2.11.2.21.2.31.2.6.62716-preview Show 27 moreShow less 1.3.01.3.11.3.21.4.01.4.11.4.21.4.31.4.41.4.51.5.01.5.11.5.21.5.31.6.01.6.21.7.01.7.11.7.21.7.31.7.41.7.51.7.61.8.01.8.11.8.21.8.31.8.4	1.8.5

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2018-8227 is a high vulnerability (CVSS 7.5) in Microsoft Chakracore, published June 14, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 16.9%, the 97th percentile. Fixed in Microsoft.ChakraCore 1.8.5.