TI-2018-05960 Aliases CVE-2018-8243 GHSA-w4qx-vw2w-q566

Out-of-bounds write in Microsoft ChakraCore

MEDIUM 47CWE-787Published 2018-06-14 · Updated 2024-08-05

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: High
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA and GitHub. Impact type from CWE-787 and the CVSS impact.

Summary

A remote code execution vulnerability exists in the way that the ChakraCore scripting engine handles objects in memory, aka "Scripting Engine Memory Corruption Vulnerability." This affects ChakraCore. This CVE ID is unique from CVE-2018-8267.

Why it matters now

EPSS 0.12244 96th percentileScored 2026-11-07

Fix Fixed Microsoft.ChakraCore (NuGet): 1.8.5

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Microsoft	ChakraCore	ChakraCore	—	No fix listed	CNA
—	Microsoft.ChakraCore (NuGet)	before 1.8.5	1.8.5	Patch available	GHSA-w4qx-vw2w-q566

ChakraCore VendorMicrosoft Affected ChakraCore Fixed in — No fix listed CNA
Microsoft.ChakraCore (NuGet) Vendor— Affected before 1.8.5 Fixed in 1.8.5 Patch available GHSA-w4qx-vw2w-q566

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:microsoft:chakracore:-:::::::*	not specified by NVD	Vulnerable	Microsoft

cpe:2.3:a:microsoft:chakracore:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft

Remediation

Fix · GHSA-w4qx-vw2w-q566 Microsoft.ChakraCore (NuGet) Fixed in 1.8.5 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2018-8243
2026-10-03 Alias added: GHSA-w4qx-vw2w-q566

References

Patch 1

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8243

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2018-8243

Other 2

TI-2020-00848 Microsoft Browser Memory Corruption Vulnerability KEVCVSS 3.1HIGH 7.5
TI-2018-06000 Type confusion in Microsoft ChakraCore KEVCVSS 3.1HIGH 7.5
TI-2019-00333 Out-of-bounds write in Microsoft Edge CVSS 3.0HIGH 7.5
TI-2019-00359 Out-of-bounds write in Microsoft Edge CVSS 3.0HIGH 7.5
TI-2018-00721 Out-of-bounds write in Microsoft Edge CVSS 3.0HIGH 7.5
TI-2018-00720 Out-of-bounds write in Microsoft Edge CVSS 3.0HIGH 7.5

See all 254 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences