Use after free in Microsoft Edge
Priority MEDIUM 64CWE-416Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- High
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA and GitHub. Impact type from CWE-416 and the CVSS impact.
Summary
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.
Why it matters now
EPSS 0.5113 98th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed Microsoft.ChakraCore (NuGet): 1.8.4
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Microsoft | Microsoft Edge | Windows 10 Version 1703 for 32-bit Systems; Windows 10 Version 1703 for x64-based Systems; Windows 10 Version 1709 for 32-bit Systems; Windows 10 Version 1709 for x64-based Systems; Windows 10 Version 1803 for 32-bit Systems; Windows 10 Version 1803 for x64-based Systems | — | No fix listed | CNA |
| Microsoft | ChakraCore | ChakraCore | — | No fix listed | CNA |
| — | Microsoft.ChakraCore (NuGet) | before 1.8.4 | 1.8.4 | Patch available | GHSA-wc67-4cg3-35wf |
- Microsoft Edge VendorMicrosoft Affected Windows 10 Version 1703 for 32-bit Systems; Windows 10 Version 1703 for x64-based Systems; Windows 10 Version 1709 for 32-bit Systems; Windows 10 Version 1709 for x64-based Systems; Windows 10 Version 1803 for 32-bit Systems; Windows 10 Version 1803 for x64-based Systems Fixed in — No fix listed CNA
- ChakraCore VendorMicrosoft Affected ChakraCore Fixed in — No fix listed CNA
- Microsoft.ChakraCore (NuGet) Vendor— Affected before 1.8.4 Fixed in 1.8.4 Patch available GHSA-wc67-4cg3-35wf
Remediation
- Fix · GHSA-wc67-4cg3-35wf Microsoft.ChakraCore (NuGet) Fixed in 1.8.4 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2018-0946
- 2026-10-03 Alias added: GHSA-wc67-4cg3-35wf
- 2026-10-18 Priority changed: HIGH → MEDIUM
References
Exploit 1
Other 5
- https://github.com/chakra-core/ChakraCore/commit/bee1e247bf6acbc8c862c7fc1d597ce9cab7446e
- https://github.com/chakra-core/ChakraCore
- https://web.archive.org/web/20210125210449/https://www.securityfocus.com/bid/103989
- https://web.archive.org/web/20211204185256/http://www.securitytracker.com/id/1040844
- https://www.exploit-db.com/exploits/44758
More Microsoft Chakracore vulnerabilities
- TI-2020-00848 Microsoft Browser Memory Corruption Vulnerability KEVCVSS 3.1HIGH 7.5
- TI-2018-06000 Type confusion in Microsoft ChakraCore KEVCVSS 3.1HIGH 7.5
- TI-2019-00333 Out-of-bounds write in Microsoft Edge CVSS 3.0HIGH 7.5
- TI-2019-00359 Out-of-bounds write in Microsoft Edge CVSS 3.0HIGH 7.5
- TI-2018-00721 Out-of-bounds write in Microsoft Edge CVSS 3.0HIGH 7.5
- TI-2018-00720 Out-of-bounds write in Microsoft Edge CVSS 3.0HIGH 7.5
Sources
- CVE-2018-0946 · CVE Program
- CVE-2018-0946 · NVD
- FIRST EPSS
- GHSA-wc67-4cg3-35wf · GitHub Advisory Database · CC BY 4.0
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