TI-2019-00867 Aliases CVE-2019-1140 GHSA-758c-g2ff-9444

Chakra Scripting Engine Memory Corruption Vulnerability

MEDIUM 47CWE-787Published 2019-08-14 · Updated 2024-08-04

Key facts

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

Attack profile from CVSS 3.1 · CNA. 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 Chakra scripting engine handles objects in memory in Microsoft Edge (HTML-based). The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. If the current user is logged on with administrative user rights, an attacker who successfully exploited the vulnerability could take control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. In a web-based attack scenario, an attacker could host a specially crafted website that is designed to exploit the vulnerability through Microsoft Edge (HTML-based) and then convince a user to view the website. The attacker could also take advantage of compromised websites and websites that accept or host user-provided content or advertisements. These websites could contain specially crafted content that could exploit the vulnerability. The security update addresses the vulnerability by modifying how the Chakra scripting engine handles objects in memory.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.03824 90th percentileScored 2026-11-07

Fix Fixed ChakraCore (Microsoft): publicationMicrosoft Edge (EdgeHTML-based) (Microsoft): publication+1 more product

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Microsoft	ChakraCore	before publication	publication	Patch available	CNA
Microsoft	Microsoft Edge (EdgeHTML-based)	1.0..0 to before publication	publication	Patch available	CNA
—	Microsoft.ChakraCore (NuGet)	before 1.11.12	1.11.12	Patch available	GHSA-758c-g2ff-9444

ChakraCore VendorMicrosoft Affected before publication Fixed in publication Patch available CNA
Microsoft Edge (EdgeHTML-based) VendorMicrosoft Affected 1.0..0 to before publication Fixed in publication Patch available CNA
Microsoft.ChakraCore (NuGet) Vendor— Affected before 1.11.12 Fixed in 1.11.12 Patch available GHSA-758c-g2ff-9444

CPE configurations NVD · 10

CPE	Versions	Role	Vendor
cpe:2.3:a:microsoft:edge:-:::::::*	not specified by NVD	Vulnerable	Microsoft
cpe:2.3:o:microsoft:windows_10:-:::::::*	not specified by NVD	Running on	Microsoft
cpe:2.3:o:microsoft:windows_10:1607:::::::*	1607	Running on	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:o:microsoft:windows_10:1803:::::::*	1803	Running on	Microsoft
cpe:2.3:o:microsoft:windows_10:1809:::::::*	1809	Running on	Microsoft
cpe:2.3:o:microsoft:windows_10:1903:::::::*	1903	Running on	Microsoft
cpe:2.3:o:microsoft:windows_server_2016:-:::::::*	not specified by NVD	Running on	Microsoft
cpe:2.3:o:microsoft:windows_server_2019:-:::::::*	not specified by NVD	Running on	Microsoft

cpe:2.3:a:microsoft:edge:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
cpe:2.3:o:microsoft:windows_10:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft
cpe:2.3:o:microsoft:windows_10:1607:*:*:*:*:*:*:* Versions 1607 Running on ·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
cpe:2.3:o:microsoft:windows_10:1803:*:*:*:*:*:*:* Versions 1803 Running on ·Microsoft
cpe:2.3:o:microsoft:windows_10:1809:*:*:*:*:*:*:* Versions 1809 Running on ·Microsoft
cpe:2.3:o:microsoft:windows_10:1903:*:*:*:*:*:*:* Versions 1903 Running on ·Microsoft
cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft
cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft

Remediation

Fix · CNA ChakraCore (Microsoft) Fixed in publication
Fix · CNA Microsoft Edge (EdgeHTML-based) (Microsoft) Fixed in publication
Fix · GHSA-758c-g2ff-9444 Microsoft.ChakraCore (NuGet) Fixed in 1.11.12 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2019-1140
2026-10-03 Alias added: GHSA-758c-g2ff-9444
2026-10-21 EPSS moved to the 90th–95th percentile
2026-10-25 EPSS moved to the 50th–90th percentile
2026-10-27 EPSS moved to the 90th–95th percentile

References

Patch 1

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1140

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2019-1140

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TI-2022-03781 Out-of-bounds write in Google Chrome KEVCVSS 3.1CRITICAL 9.6
TI-2015-00277 Use-after-free vulnerability in Adobe Flash Player before 13.0.0.269 and 14.x through… KEVCVSS 3.1CRITICAL 9.8
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TI-2020-12621 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8

See all 761 →

Sources

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