Chakra Scripting Engine Memory Corruption Vulnerability

Description

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.

Scores

EPSS (exploitation in 30 days)

2.4% · top 16% of all CVEs (2 Nov 2026)

Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.2.

Weakness

• Remote Code Execution
• CWE-787 (opens in a new tab)

Affected products

• Microsoft · ChakraCore

  • affected < publication

• Microsoft · Microsoft Edge (EdgeHTML-based)

  • affected 1.0..0 – < publication

Affected packages

From reviewed advisories of the GitHub Advisory Database.

• NuGetMicrosoft.ChakraCoreGHSA-g8q3-rcf9-qx4q (opens in a new tab)

References (2)

• Chakra Scripting Engine Memory Corruption Vulnerability (opens in a new tab)vendor-advisory
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1024 (opens in a new tab)x_refsource_MISCx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisory GHSA-g8q3-rcf9-qx4q (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Record last updated 20 May 2025, 17:50 UTC.