CVE-2018-8139
HighPublic exploitChakraCore RCE Vulnerability
Published May 13, 2022 · Updated Aug 27, 2026 · Also known as GHSA-5hxp-3237-j2hp
Key Facts
Patch immediately- CVE-2018-8139 is a high-severity vulnerability (CVSS 7.5 v3.1) affecting ChakraCore (Microsoft), Edge (Microsoft), Microsoft.ChakraCore (nuget).
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 67% probability of exploitation in the next 30 days.
- Fixed versions are available, including ChakraCore <=1.8.3, Microsoft.ChakraCore 1.8.4, ChakraCore 1.8.3.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3.1
7.5
CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
67%
Higher than 99.2% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2018-8139 brief as a PDF
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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-2018-0946, 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.
Affected Products
5 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| ChakraCoreMicrosoft | >= ChakraCore | 1.8.3 |
| EdgeMicrosoft | >= Windows 10 Version 1803 for 32-bit Systems | n/a |
| Microsoft.ChakraCorenuget | See advisory | 1.8.4 |
Patched Releases
ChakraCore
<=1.8.3
Microsoft.ChakraCore
1.8.4
Timeline
Publicly disclosed
May 13, 2022
Last updated
Aug 27, 2026
Weakness Type
- CWE-125 Out-of-bounds Read
References
- advisoryGHSA advisory
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2018-8139
- advisory103977
- advisory1040844
- exploit45012
FAQ
Common Questions.
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.
Affected: ChakraCore (Microsoft) versions >= ChakraCore; Edge (Microsoft) versions >= Windows 10 Version 1803 for 32-bit Systems; Microsoft.ChakraCore (nuget). The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including ChakraCore <=1.8.3, Microsoft.ChakraCore 1.8.4, ChakraCore 1.8.3.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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