CVE-2018-8617

HIGH

ChakraCore - Remote Code Execution via Memory Corruption

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 2 public exploits for CVE-2018-8617. PoCs published by Google Security Research, bb33bb.

AI-analyzed exploit summary This PoC exploits a type confusion vulnerability in Chakra (CVE-2018-8617) by manipulating object properties and array operations to achieve arbitrary memory read/write. The exploit leverages incorrect type symbol handling during InlineArrayPush optimization.

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-2018-8583, CVE-2018-8618, CVE-2018-8624, CVE-2018-8629.

Exploits (2)

exploitdb WORKING POC VERIFIED
by Google Security Research · javascriptdoswindows
https://www.exploit-db.com/exploits/46202

This PoC exploits a type confusion vulnerability in Chakra (CVE-2018-8617) by manipulating object properties and array operations to achieve arbitrary memory read/write. The exploit leverages incorrect type symbol handling during InlineArrayPush optimization.

Classification
Working Poc 90%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Microsoft ChakraCore (Edge/IE JavaScript engine)
No auth needed
Prerequisites: Target must be running a vulnerable version of ChakraCore
devstral-2 · analyzed Feb 16, 2026 Full analysis →
nomisec WORKING POC
by bb33bb · poc
https://github.com/bb33bb/cve-2018-8617-aab-r-w-

This PoC exploits a type confusion vulnerability in ChakraCore (CVE-2018-8617) to achieve arbitrary read/write primitives, leading to potential RCE. It manipulates object properties and DataView buffers to leak addresses and bypass security mechanisms.

Classification
Working Poc 90%
Attack Type
Rce
Complexity
Complex
Reliability
Reliable
Target: ChakraCore (Microsoft Edge)
No auth needed
Prerequisites: Target must be running a vulnerable version of ChakraCore (e.g., Microsoft Edge prior to patch)
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3
Core References
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/106112
Exploit, Third Party Advisory, VDB Entry exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/46202/

Scores

CVSS v3 7.5
EPSS 0.6248
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-787
Status published
Products (3)
microsoft/chakracore
microsoft/edge
nuget/Microsoft.ChakraCore 0 - 1.11.3NuGet
Published Dec 12, 2018
Tracked Since Feb 18, 2026