CVE-2018-0939

ChakraCore information disclosure vulnerability

4.3 MediumFix available

ChakraCore and Microsoft Edge in Windows 10 1703 and 1709 allow information disclosure, due to how the scripting engine handles objects in memory, aka "Scripting Engine Information Disclosure Vulnerability". This CVE ID is unique from CVE-2018-0891.

Attack profile

How easy it is to exploit

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

What an attacker can affect

Confidentiality: Low
Integrity: None
Availability: None

Exploit likelihood

5.50%Down 3.3 points since Apr 14, 2021

What each source reports

NVD Score used 4.3

Record: CVE-2018-0939
CVSS 3.0: 4.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
CVSS 2.0: 4.3 MediumAV:N/AC:M/Au:N/C:P/I:N/A:N
Weakness: CWE-787
Updated: 2026-11-02

CVE List No score

Record: CVE-2018-0939
Updated: 2026-11-02

EUVDEUVD-2022-5783 No score

Record: EUVD-2022-5783
Updated: 2026-11-03

GitHub AdvisoriesGHSA-xgcc-r2f3-rq6p 4.3

ChakraCore information disclosure vulnerability

Record: GHSA-xgcc-r2f3-rq6p
CVSS 3.0: 4.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Weakness: CWE-787
Updated: 2026-11-02

OSVGHSA-xgcc-r2f3-rq6p 4.3

ChakraCore information disclosure vulnerability

Record: GHSA-xgcc-r2f3-rq6p
CVSS 3.0: 4.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Weakness: CWE-787
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`Microsoft.ChakraCore` NuGet	before 1.8.2	1.8.2
`Microsoft.ChakraCore` NuGet	before 1.8.2, plus listed versions 1.2.01.2.11.2.21.2.31.2.6.62716-preview Show 24 moreShow less 1.3.01.3.11.3.21.4.01.4.11.4.21.4.31.4.41.4.51.5.01.5.11.5.21.5.31.6.01.6.21.7.01.7.11.7.21.7.31.7.41.7.51.7.61.8.01.8.1	1.8.2

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-2018-0939 is a medium vulnerability (CVSS 4.3) in Microsoft Edge, published March 14, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 5.50%, the 92nd percentile. Fixed in Microsoft.ChakraCore 1.8.2.