TI-2018-00797 Aliases CVE-2018-0856 GHSA-399v-jg88-3gx6

Out-of-bounds write in Microsoft Edge, ChakraCore

MEDIUM 49CWE-787Published 2018-02-15 · Updated 2024-09-16

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

Microsoft Edge and ChakraCore in Microsoft Windows 10 1703 and 1709 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-2018-0834, CVE-2018-0835, CVE-2018-0836, CVE-2018-0837, CVE-2018-0838, CVE-2018-0840, CVE-2018-0857, CVE-2018-0858, CVE-2018-0859, CVE-2018-0860, CVE-2018-0861, and CVE-2018-0866.

Why it matters now

EPSS 0.1543 96th percentileScored 2026-11-07

Fix Fixed Microsoft.ChakraCore (NuGet): 1.8.1

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	Microsoft Edge, ChakraCore	Microsoft Windows 10 1703 and 1709.	—	No fix listed	CNA
—	Microsoft.ChakraCore (NuGet)	before 1.8.1	1.8.1	Patch available	GHSA-399v-jg88-3gx6

Microsoft Edge, ChakraCore VendorMicrosoft Affected Microsoft Windows 10 1703 and 1709. Fixed in — No fix listed CNA
Microsoft.ChakraCore (NuGet) Vendor— Affected before 1.8.1 Fixed in 1.8.1 Patch available GHSA-399v-jg88-3gx6

CPE configurations NVD · 4

CPE	Versions	Role	Vendor
cpe:2.3:a:microsoft:chakracore:-:::::::*	not specified by NVD	Vulnerable	Microsoft
cpe:2.3:a:microsoft:edge:-:::::::*	not specified by NVD	Vulnerable	Microsoft
cpe:2.3:o:microsoft:windows_10:1703:::::::*	1703	Running on	Microsoft
cpe:2.3:o:microsoft:windows_10:1709:::::::*	1709	Running on	Microsoft

cpe:2.3:a:microsoft:chakracore:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
cpe:2.3:a:microsoft:edge:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
cpe:2.3:o:microsoft:windows_10:1703:*:*:*:*:*:*:* Versions 1703 Running on ·Microsoft
cpe:2.3:o:microsoft:windows_10:1709:*:*:*:*:*:*:* Versions 1709 Running on ·Microsoft

Remediation

Fix · GHSA-399v-jg88-3gx6 Microsoft.ChakraCore (NuGet) Fixed in 1.8.1 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2018-0856
2026-10-03 Alias added: GHSA-399v-jg88-3gx6

References

Patch 1

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0856

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2018-0856

Other 4

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