CVE-2018-0834

ChakraCore RCE Vulnerability

7.5 HighPublic exploitFix available

Microsoft Edge and ChakraCore in Microsoft Windows 10 Gold, 1511, 1607, 1703, 1709, and Windows Server 2016 allows remote code execution, due to how the scripting engine handles objects in memory, aka "Scripting Engine Memory Corruption Vulnerability". This CVE ID is unique from CVE-2018-0835, CVE-2018-0836, CVE-2018-0837, CVE-2018-0838, CVE-2018-0840, CVE-2018-0856, CVE-2018-0857, CVE-2018-0858, CVE-2018-0859, CVE-2018-0860, CVE-2018-0861, and CVE-2018-0866.

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

55.2%Up 5.8 points since Apr 14, 2021

What each source reports

NVD Score used 7.5

Record: CVE-2018-0834
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: 9.3 HighAV:N/AC:M/Au:N/C:C/I:C/A:C
Weakness: CWE-787
Updated: 2026-11-02

CVE List No score

Record: CVE-2018-0834
Updated: 2026-11-02

EUVDEUVD-2022-2606 No score

Record: EUVD-2022-2606
Updated: 2026-11-03

GitHub AdvisoriesGHSA-5j48-826p-2w9r 7.5

ChakraCore RCE Vulnerability

Record: GHSA-5j48-826p-2w9r
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

OSVGHSA-5j48-826p-2w9r 7.5

ChakraCore RCE Vulnerability

Record: GHSA-5j48-826p-2w9r
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 1.8.1	1.8.1
`Microsoft.ChakraCore` NuGet	before 1.8.1, plus listed versions 1.2.01.2.11.2.21.2.31.2.6.62716-preview Show 23 moreShow less 1.3.01.3.11.3.21.4.01.4.11.4.21.4.31.4.41.4.51.5.01.5.11.5.21.5.31.6.01.6.21.7.01.7.11.7.21.7.31.7.41.7.51.7.61.8.0	1.8.1

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
Exploit-DB	Microsoft Edge Chakra JIT - Array Type Confusion via InitProto Instructions	2018-02-15
PoC in GitHub	SpiralBL0CK/-CVE-2018-0834-aab-aar	2024-09-09

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, Exploit-DB, GitHub Advisories, NVD, OSV, PoC in GitHub

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

In short

CVE-2018-0834 is a high vulnerability (CVSS 7.5) in Microsoft Chakracore, published February 15, 2018. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 55.2%, the 99th percentile. Fixed in Microsoft.ChakraCore 1.8.1.

References

Show 4 moreShow less