CVE-2018-8229

HIGH

Microsoft Edge and ChakraCore - Remote Code Execution via Type Confusion

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2018-8229. PoCs published by Google Security Research.

AI-analyzed exploit summary This PoC demonstrates a type confusion vulnerability in JavaScript engines by manipulating string concatenation and charCodeAt operations, leading to potential memory corruption or arbitrary code execution.

Description

A remote code execution vulnerability exists in the way that the Chakra scripting engine handles objects in memory in Microsoft Edge, aka "Chakra Scripting Engine Memory Corruption Vulnerability." This affects Microsoft Edge, ChakraCore. This CVE ID is unique from CVE-2018-8227.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Google Security Research · javascriptdoswindows
https://www.exploit-db.com/exploits/45013

This PoC demonstrates a type confusion vulnerability in JavaScript engines by manipulating string concatenation and charCodeAt operations, leading to potential memory corruption or arbitrary code execution.

Classification
Working Poc 90%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Microsoft ChakraCore (Edge/IE JavaScript Engine)
No auth needed
Prerequisites: Target must execute the JavaScript code in a vulnerable ChakraCore environment
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (4)

Core 4
Core References
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/104369
Third Party Advisory, VDB Entry exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/45013/
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id/1041097

Scores

CVSS v3 7.5
EPSS 0.7992
EPSS Percentile 99.1%
Attack Vector NETWORK
CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Details

CWE
CWE-843
Status published
Products (3)
microsoft/chakracore < 1.8.4
microsoft/edge
nuget/Microsoft.ChakraCore 0 - 1.8.5NuGet
Published Jun 14, 2018
Tracked Since Feb 18, 2026