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Vulnerability details: VCID-1d45-g18p-kkay
Vulnerability ID VCID-1d45-g18p-kkay
Aliases CVE-2018-0858
GHSA-7gjv-9m33-chg8
Summary Out-of-bounds Write ChakraCore allows remote code execution, due to how the ChakraCore scripting engine handles objects in memory, aka "Scripting Engine Memory Corruption Vulnerability". This CVE ID is unique from CVE-2018-0834, CVE-2018-0835, CVE-2018-0836, CVE-2018-0837, CVE-2018-0838, CVE-2018-0840, CVE-2018-0856, CVE-2018-0857, CVE-2018-0859, CVE-2018-0860, CVE-2018-0861, and CVE-2018-0866.
Status Published
Exploitability None
Weighted Severity None
Risk None
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-787 Out-of-bounds Write
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.26244 https://api.first.org/data/v1/epss?cve=CVE-2018-0858
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-7gjv-9m33-chg8
cvssv3.1 7.5 https://github.com/chakra-core/ChakraCore
generic_textual HIGH https://github.com/chakra-core/ChakraCore
cvssv3.1 7.5 https://github.com/chakra-core/ChakraCore/commit/972009a89e51c69971b80b1f5394886b304f880a
generic_textual HIGH https://github.com/chakra-core/ChakraCore/commit/972009a89e51c69971b80b1f5394886b304f880a
cvssv3.1 7.5 https://nvd.nist.gov/vuln/detail/CVE-2018-0858
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2018-0858
cvssv3.1 7.5 https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0858
generic_textual HIGH https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0858
cvssv3.1 7.5 https://web.archive.org/web/20210124135655/http://www.securityfocus.com/bid/102865
generic_textual HIGH https://web.archive.org/web/20210124135655/http://www.securityfocus.com/bid/102865
cvssv3.1 7.5 https://web.archive.org/web/20211208072939/http://www.securitytracker.com/id/1040372
generic_textual HIGH https://web.archive.org/web/20211208072939/http://www.securitytracker.com/id/1040372
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2018-0858
https://github.com/chakra-core/ChakraCore
https://github.com/chakra-core/ChakraCore/commit/972009a89e51c69971b80b1f5394886b304f880a
https://web.archive.org/web/20210124135655/http://www.securityfocus.com/bid/102865
https://web.archive.org/web/20211208072939/http://www.securitytracker.com/id/1040372
http://www.securityfocus.com/bid/102865
http://www.securitytracker.com/id/1040372
CVE-2018-0858 https://nvd.nist.gov/vuln/detail/CVE-2018-0858
CVE-2018-0858 https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0858
GHSA-7gjv-9m33-chg8 https://github.com/advisories/GHSA-7gjv-9m33-chg8
No exploits are available.
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://github.com/chakra-core/ChakraCore
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:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://github.com/chakra-core/ChakraCore/commit/972009a89e51c69971b80b1f5394886b304f880a
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:3.0/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-2018-0858
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:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0858
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:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://web.archive.org/web/20210124135655/http://www.securityfocus.com/bid/102865
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:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://web.archive.org/web/20211208072939/http://www.securitytracker.com/id/1040372
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 0.96391
EPSS Score 0.26244
Published At May 30, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-05-30T20:53:25.847655+00:00 GitLab Importer Import https://gitlab.com/gitlab-org/advisories-community/-/blob/main/nuget/Microsoft.ChakraCore/CVE-2018-0858.yml 38.6.0