CVE-2018-8279

HIGH

Microsoft Edge and ChakraCore - Remote Code Execution via Memory Corruption

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2018-8279. PoCs published by Google Security Research.

AI-analyzed exploit summary This PoC exploits a type confusion vulnerability in Chakra (CVE-2018-8279) by generating incorrect bytecode due to improper handling of async functions and try-catch blocks. The exploit triggers a yield operation within a try-catch, leading to type confusion in the InterpreterStackFrame::OP_ResumeYield method.

Description

A remote code execution vulnerability exists when Microsoft Edge improperly accesses objects in memory, aka "Microsoft Edge Memory Corruption Vulnerability." This affects Microsoft Edge, ChakraCore. This CVE ID is unique from CVE-2018-8125, CVE-2018-8262, CVE-2018-8274, CVE-2018-8275, CVE-2018-8301.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Google Security Research · javascriptdoswindows
https://www.exploit-db.com/exploits/45214

This PoC exploits a type confusion vulnerability in Chakra (CVE-2018-8279) by generating incorrect bytecode due to improper handling of async functions and try-catch blocks. The exploit triggers a yield operation within a try-catch, leading to type confusion in the InterpreterStackFrame::OP_ResumeYield method.

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 (e.g., Microsoft Edge or Internet Explorer)
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (4)

Core 4
Core References
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id/1041256
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/104641
Exploit, Third Party Advisory, VDB Entry exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/45214/

Scores

CVSS v3 7.5
EPSS 0.7104
EPSS Percentile 99.3%
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 (2)
microsoft/chakracore < 1.10.0
microsoft/edge
Published Jul 11, 2018
Tracked Since Feb 18, 2026