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CVE-2018-8359

30
FAUCET Score

CVE-2018-8359 describes a remote code execution vulnerability within the ChakraCore scripting engine, specifically related to how it handles objects in memory. This flaw affects Microsoft ChakraCore, allowing an attacker to execute arbitrary code. With a CVSS score of 7.5 (High), exploitation requires user interaction (UI:R) and has high impact on confidentiality, integrity, and availability (C:H/I:H/A:H), but with high attack complexity (AC:H). While no public exploit code (Metasploit, Nuclei, ExploitDB) is available, the vulnerability has received some community discussion and media coverage, though it is not currently on the CISA KEV catalog or considered actively exploited.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:microsoft:chakracore:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.6
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
14.51%
Probability of exploitation in next 30 days
EPSS Percentile
96.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.1451 is in the 81st percentile among its peer group of 1,572 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.4 Bluesky, 0.2 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.6 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

microsoftpatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: ChakraCore
View patch
nugetpatch availablevia ghsa
Product: Microsoft.ChakraCoreFixed in: 1.10.2

Vendor Advisories (2)

nugetGHSA-38r7-rv5p-ggwqhigh

ChakraCore RCE Vulnerability

May 13, 2022
microsoft2018-Aug/CVE-2018-8359Critical

Scripting Engine Memory Corruption Vulnerability

Aug 14, 2018

References

portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2018-8359
PatchVendor Advisory
securityfocus.com / bid/104990
Third Party AdvisoryVDB Entry
securitytracker.com / id/1041457
Third Party AdvisoryVDB Entry