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Vulnerability details: VCID-s7sv-fmhb-x7ar
Vulnerability ID VCID-s7sv-fmhb-x7ar
Aliases CVE-2018-8287
GHSA-p97q-j98q-f98w
Summary Out-of-bounds Write A remote code execution vulnerability exists in the way the scripting engine handles objects in memory in Microsoft browsers, aka "Scripting Engine Memory Corruption Vulnerability." This affects ChakraCore, Internet Explorer, Microsoft Edge, Internet Explorer This CVE ID is unique from CVE-2018-8242, CVE-2018-8283, CVE-2018-8288, CVE-2018-8291, CVE-2018-8296, CVE-2018-8298.
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 0.24465 https://api.first.org/data/v1/epss?cve=CVE-2018-8287
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/fa89a7031e75ca8b4a595765e897e8fc0d9fae76
generic_textual HIGH https://github.com/chakra-core/ChakraCore/commit/fa89a7031e75ca8b4a595765e897e8fc0d9fae76
cvssv3.1 7.5 https://github.com/chakra-core/ChakraCore/pull/5444
generic_textual HIGH https://github.com/chakra-core/ChakraCore/pull/5444
cvssv3.1 7.5 https://nvd.nist.gov/vuln/detail/CVE-2018-8287
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2018-8287
cvssv3.1 7.5 https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8287
generic_textual HIGH https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8287
cvssv3.1 7.5 https://web.archive.org/web/20210125211352/http://www.securityfocus.com/bid/104634
generic_textual HIGH https://web.archive.org/web/20210125211352/http://www.securityfocus.com/bid/104634
cvssv3.1 7.5 https://web.archive.org/web/20211202002348/http://www.securitytracker.com/id/1041256
generic_textual HIGH https://web.archive.org/web/20211202002348/http://www.securitytracker.com/id/1041256
cvssv3.1 7.5 https://web.archive.org/web/20220120050525/http://www.securitytracker.com/id/1041258
generic_textual HIGH https://web.archive.org/web/20220120050525/http://www.securitytracker.com/id/1041258
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2018-8287
https://github.com/chakra-core/ChakraCore
https://github.com/chakra-core/ChakraCore/commit/fa89a7031e75ca8b4a595765e897e8fc0d9fae76
https://github.com/chakra-core/ChakraCore/pull/5444
https://web.archive.org/web/20210125211352/http://www.securityfocus.com/bid/104634
https://web.archive.org/web/20211202002348/http://www.securitytracker.com/id/1041256
https://web.archive.org/web/20220120050525/http://www.securitytracker.com/id/1041258
http://www.securityfocus.com/bid/104634
http://www.securitytracker.com/id/1041256
http://www.securitytracker.com/id/1041258
CVE-2018-8287 https://nvd.nist.gov/vuln/detail/CVE-2018-8287
CVE-2018-8287 https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8287
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/fa89a7031e75ca8b4a595765e897e8fc0d9fae76
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/pull/5444
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-2018-8287
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-2018-8287
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/20210125211352/http://www.securityfocus.com/bid/104634
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/20211202002348/http://www.securitytracker.com/id/1041256
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/20220120050525/http://www.securitytracker.com/id/1041258
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 0.96216
EPSS Score 0.24465
Published At June 4, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-02T04:38:00.041757+00:00 GitLab Importer Import https://gitlab.com/gitlab-org/advisories-community/-/blob/main/nuget/Microsoft.ChakraCore/CVE-2018-8287.yml 38.6.0