CVE-2018-0946

HIGH

Microsoft Edge and ChakraCore - Remote Code Execution via Scripting Engine Memory Corruption

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2018-0946. PoCs published by Google Security Research.

AI-analyzed exploit summary This exploit leverages a Use-After-Free vulnerability in Microsoft ChakraCore (CVE-2018-0946) by bypassing the CrossSite wrapper mechanism via the DataView EntryGetterBuffer method. It demonstrates arbitrary memory access by retrieving a freed string constant from a closed iframe context.

Description

A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Microsoft Edge, aka "Scripting Engine Memory Corruption Vulnerability." This affects Microsoft Edge, ChakraCore. This CVE ID is unique from CVE-2018-0945, CVE-2018-0951, CVE-2018-0953, CVE-2018-0954, CVE-2018-0955, CVE-2018-1022, CVE-2018-8114, CVE-2018-8122, CVE-2018-8128, CVE-2018-8137, CVE-2018-8139.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Google Security Research · htmldoswindows
https://www.exploit-db.com/exploits/44758

This exploit leverages a Use-After-Free vulnerability in Microsoft ChakraCore (CVE-2018-0946) by bypassing the CrossSite wrapper mechanism via the DataView EntryGetterBuffer method. It demonstrates arbitrary memory access by retrieving a freed string constant from a closed iframe context.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Microsoft ChakraCore (Edge/IE JavaScript Engine)
No auth needed
Prerequisites: Target must use ChakraCore (e.g., Microsoft Edge or Internet Explorer) · JavaScript execution context (e.g., browser)
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (4)

Core 4
Core References
Third Party Advisory, VDB Entry exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/44758/
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/103989
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id/1040844

Scores

CVSS v3 7.5
EPSS 0.6359
EPSS Percentile 98.4%
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-416 CWE-787
Status published
Products (3)
microsoft/chakracore < 1.8.3
microsoft/edge
nuget/Microsoft.ChakraCore 0 - 1.8.4NuGet
Published May 09, 2018
Tracked Since Feb 18, 2026