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.NET
.NET NuGet
Not in CISA KEV
HIGH severity

CVE-2020-0828 — Microsoft.ChakraCore

HIGH

CVE-2020-0828 is a high-severity (CVSS 7.5) Out-of-bounds Write vulnerability in Microsoft.ChakraCore. A fix is available for Microsoft.ChakraCore — see the affected versions and patch details below.

Out-of-bounds Write in ChakraCore

Also known asGHSA-c8qc-62qv-5p2x
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Oct 9, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
8.9%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs95th percentile — riskier than 95% of all scored CVEsHighest risk
2.34%5.01%7.68%10.4%3.8%8.9%Apr 26Aug 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

CVE-2020-0828 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,386 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

1 pkg affected
.NETMicrosoft.ChakraCore

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects NuGet packages — download data is not available via public APIs for these ecosystems.

Description

A remote code execution vulnerability exists in the way that the ChakraCore scripting engine handles objects in memory, aka 'Scripting Engine Memory Corruption Vulnerability'. This CVE ID is unique from CVE-2020-0768, CVE-2020-0823, CVE-2020-0825, CVE-2020-0826, CVE-2020-0827, CVE-2020-0829, CVE-2020-0830, CVE-2020-0831, CVE-2020-0832, CVE-2020-0833, CVE-2020-0848.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
.NETNuGetMicrosoft.ChakraCoreall versions1.11.17dotnet add package Microsoft.ChakraCore --version 1.11.17

Affected Products

2 products · 2 configurations
Application
chakracoremicrosoft
< 1.11.17
range
Application
edgemicrosoft
all

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for Microsoft.ChakraCore, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update Microsoft.ChakraCore to 1.11.17 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2020-0828 is resolved across your whole dependency graph.

  3. Workarounds

    Constrain what reaches the vulnerable code: limit the size and shape of untrusted input, isolate the affected component in a sandboxed or least-privileged process, and enable the platform's memory-safety mitigations (ASLR, stack protector, hardened allocator) so an out-of-bounds access is more likely to fail closed than to be exploitable.

Frequently Asked Questions

A remote code execution vulnerability exists in the way that the ChakraCore scripting engine handles objects in memory, aka 'Scripting Engine Memory Corruption Vulnerability'. This CVE ID is unique from CVE-2020-0768, CVE-2020-0823, CVE-2020-0825, CVE-2020-0826, CVE-2020-0827, CVE-2020-0829, CVE-2020-0830, CVE-2020-0831, CVE-2020-0832, CVE-2020-0833, CVE-2020-0848.
O3 Security · Impact-Aware SCA

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CVE-2020-0828: Microsoft RCE — Fixed in 1.11.17