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Vulnerability details: VCID-q34w-zm56-wfgd
Vulnerability ID VCID-q34w-zm56-wfgd
Aliases CVE-2020-17131
GHSA-qwwg-gc55-qqrv
Summary Out-of-bounds Write in Chakra Chakra Scripting Engine Memory Corruption Vulnerability
Status Published
Exploitability None
Weighted Severity None
Risk None
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-787 Out-of-bounds Write
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.01166 https://api.first.org/data/v1/epss?cve=CVE-2020-17131
cvssv3.1 7.5 https://github.com/chakra-core/ChakraCore/pull/6531
generic_textual HIGH https://github.com/chakra-core/ChakraCore/pull/6531
cvssv3.1 7.5 https://github.com/chakra-core/ChakraCore/wiki/Roadmap#v11124
generic_textual HIGH https://github.com/chakra-core/ChakraCore/wiki/Roadmap#v11124
cvssv3.1 7.5 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-17131
generic_textual HIGH https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-17131
cvssv3.1 7.5 https://nvd.nist.gov/vuln/detail/CVE-2020-17131
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2020-17131
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2020-17131
https://github.com/chakra-core/ChakraCore/pull/6531
https://github.com/chakra-core/ChakraCore/wiki/Roadmap#v11124
CVE-2020-17131 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-17131
CVE-2020-17131 https://nvd.nist.gov/vuln/detail/CVE-2020-17131
GHSA-qwwg-gc55-qqrv https://github.com/advisories/GHSA-qwwg-gc55-qqrv
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://github.com/chakra-core/ChakraCore/pull/6531
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://github.com/chakra-core/ChakraCore/wiki/Roadmap#v11124
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-17131
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2020-17131
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.78975
EPSS Score 0.01166
Published At June 4, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-04T16:21:02.175277+00:00 GitLab Importer Import https://gitlab.com/gitlab-org/advisories-community/-/blob/main/nuget/Microsoft.ChakraCore/CVE-2020-17131.yml 38.6.0