CVE-2018-8298: Microsoft.ChakraCore Remote Code Execution Vulnerability

HIGH
Advisory Identifier: GHSA-wgw2-wwq8-c7wf
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CVSS 7.5
CWE-843
Published
Advisory Summary

CVE-2018-8298 is a HIGH (CVSS 7.5) remote code execution vulnerability (CWE-843: Access of Resource Using Incompatible Type ('Type Confusion')) affecting Microsoft.ChakraCore libraries in the NuGet ecosystem. The issue involves chakracore rce vulnerability. Remediation is available by upgrading affected packages to version 1.10.1.

CVE-2018-8298 at a Glance

CVE Identifier CVE-2018-8298
GHSA Identifier GHSA-wgw2-wwq8-c7wf
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-843: Access of Resource Using Incompatible Type ('Type Confusion')
Affected Product Microsoft.ChakraCore
Package Ecosystem NuGet
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:H).

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required None (PR:N)
User Interaction Required (UI:R)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2018-8298

To remediate this vulnerability, upgrade all affected Microsoft.ChakraCore dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

Microsoft.ChakraCore fixed: 1.10.1 
Upgrade Microsoft.ChakraCore to 1.10.1
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for Microsoft.ChakraCore

How to Check if You Are Affected

To determine whether your application is affected by CVE-2018-8298, inspect your project dependencies for Microsoft.ChakraCore:

inspect dependencies for Microsoft.ChakraCore

Analyze the terminal output to locate any version of Microsoft.ChakraCore in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.10.1), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-843: Access of Resource Using Incompatible Type ('Type Confusion'), where the product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type. In Microsoft.ChakraCore, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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-2018-8242, CVE-2018-8283, CVE-2018-8287, CVE-2018-8288, CVE-2018-8291, CVE-2018-8296.

CVE-2018-8298 Affected Microsoft.ChakraCore Versions

1 component(s)
Fixed Versions:
1.10.1
Product / Package Ecosystem Affected Versions Fixed Version
Microsoft.ChakraCore
nuget/Microsoft.ChakraCore
NuGet
< 1.10.1
1.10.1

References

NVD — CVE-2018-8298 NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-8298
Microsoft.ChakraCore Source Repository REPOSITORY
https://github.com/chakra-core/ChakraCore/pull/5444
Security Fix Commit FIX COMMIT
https://github.com/chakra-core/ChakraCore/commit/cb9957e2763c36dbd12afa5c9261465159e16c86
Microsoft.ChakraCore Source Repository REPOSITORY
https://github.com/chakra-core/ChakraCore
Microsoft.ChakraCore Security Information SECURITY
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8298
Microsoft.ChakraCore Security Information SECURITY
https://web.archive.org/web/20210124183835/http://www.securityfocus.com/bid/104639
www.cisa.gov/known-exploited-vul... WEB
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-8298
www.exploit-db.com/exploits/45217 WEB
https://www.exploit-db.com/exploits/45217

Frequently Asked Questions

What is CVE-2018-8298?
CVE-2018-8298 is a security vulnerability in Microsoft.ChakraCore involving ChakraCore RCE Vulnerability under CWE-843: Access of Resource Using Incompatible Type ('Type Confusion').
Which Microsoft.ChakraCore versions are affected?
Affected versions include releases prior to 1.10.1 across affected packages: Microsoft.ChakraCore.
What version fixes CVE-2018-8298?
Upgrading to 1.10.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is Microsoft.ChakraCore affected?
Yes, Microsoft.ChakraCore is affected in releases prior to 1.10.1. Upgrade your dependency to 1.10.1 or later.
What is the CVSS score of CVE-2018-8298?
CVE-2018-8298 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:H.
What CWE is associated with CVE-2018-8298?
CVE-2018-8298 is classified under CWE-843: Access of Resource Using Incompatible Type ('Type Confusion') (The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type.).
How can I check NuGet dependencies for CVE-2018-8298?
Run the dependency tree command: 'inspect dependencies for Microsoft.ChakraCore'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-wgw2-wwq8-c7wf",
  "modified" : "2025-10-22T17:37:09Z",
  "published" : "2022-05-13T01:20:46Z",
  "aliases" : [ "CVE-2018-8298" ],
  "summary" : "ChakraCore RCE Vulnerability",
  "details" : "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-2018-8242, CVE-2018-8283, CVE-2018-8287, CVE-2018-8288, CVE-2018-8291, CVE-2018-8296.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "Microsoft.ChakraCore"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.10.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2018-8298"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/chakra-core/ChakraCore/pull/5444"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/chakra-core/ChakraCore/commit/cb9957e2763c36dbd12afa5c9261465159e16c86"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/chakra-core/ChakraCore"
  }, {
    "type" : "WEB",
    "url" : "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8298"
  }, {
    "type" : "WEB",
    "url" : "https://web.archive.org/web/20210124183835/http://www.securityfocus.com/bid/104639"
  }, {
    "type" : "WEB",
    "url" : "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-8298"
  }, {
    "type" : "WEB",
    "url" : "https://www.exploit-db.com/exploits/45217"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-843" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-07-21T20:39:24Z",
    "nvd_published_at" : "2018-07-11T00:29:00Z"
  }
}