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Vulnerability details: VCID-1664-tgnt-a3hq
Vulnerability ID VCID-1664-tgnt-a3hq
Aliases CVE-2018-21036
GHSA-f7f4-hqp2-7prc
Summary Improper Input Validation Sails.js allows attackers to cause a denial of service with a single request because there is no error handler in sails-hook-sockets to handle an empty pathname in a WebSocket request.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-20 Improper Input Validation
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.00714 https://api.first.org/data/v1/epss?cve=CVE-2018-21036
epss 0.00714 https://api.first.org/data/v1/epss?cve=CVE-2018-21036
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-f7f4-hqp2-7prc
cvssv3.1 7.5 https://github.com/balderdashy/sails/blob/56f8276f6501a144a03d1f0f28df4ccdb4ad82e2/CHANGELOG.md
generic_textual HIGH https://github.com/balderdashy/sails/blob/56f8276f6501a144a03d1f0f28df4ccdb4ad82e2/CHANGELOG.md
cvssv3.1 7.5 https://github.com/balderdashy/sails-hook-sockets
generic_textual HIGH https://github.com/balderdashy/sails-hook-sockets
cvssv3.1 7.5 https://github.com/balderdashy/sails-hook-sockets/commit/0533a4864b1920fd8fbb5287bc0889193c5faf44
generic_textual HIGH https://github.com/balderdashy/sails-hook-sockets/commit/0533a4864b1920fd8fbb5287bc0889193c5faf44
cvssv3.1 7.5 https://github.com/balderdashy/sails-hook-sockets/commit/ff02114eaec090ee51db48435cc32d451662606e
generic_textual HIGH https://github.com/balderdashy/sails-hook-sockets/commit/ff02114eaec090ee51db48435cc32d451662606e
cvssv3.1 7.5 https://nvd.nist.gov/vuln/detail/CVE-2018-21036
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2018-21036
cvssv3.1 7.5 http://www.openwall.com/lists/oss-security/2020/07/19/1
generic_textual HIGH http://www.openwall.com/lists/oss-security/2020/07/19/1
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2018-21036
https://github.com/balderdashy/sails/blob/56f8276f6501a144a03d1f0f28df4ccdb4ad82e2/CHANGELOG.md
https://github.com/balderdashy/sails-hook-sockets
https://github.com/balderdashy/sails-hook-sockets/commit/0533a4864b1920fd8fbb5287bc0889193c5faf44
https://github.com/balderdashy/sails-hook-sockets/commit/ff02114eaec090ee51db48435cc32d451662606e
http://www.openwall.com/lists/oss-security/2020/07/19/1
CVE-2018-21036 https://nvd.nist.gov/vuln/detail/CVE-2018-21036
GHSA-f7f4-hqp2-7prc https://github.com/advisories/GHSA-f7f4-hqp2-7prc
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/balderdashy/sails/blob/56f8276f6501a144a03d1f0f28df4ccdb4ad82e2/CHANGELOG.md
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:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/balderdashy/sails-hook-sockets
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:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/balderdashy/sails-hook-sockets/commit/0533a4864b1920fd8fbb5287bc0889193c5faf44
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:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/balderdashy/sails-hook-sockets/commit/ff02114eaec090ee51db48435cc32d451662606e
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:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2018-21036
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:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at http://www.openwall.com/lists/oss-security/2020/07/19/1
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 0.72707
EPSS Score 0.00714
Published At June 4, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-04T16:20:08.001454+00:00 GitLab Importer Import https://gitlab.com/gitlab-org/advisories-community/-/blob/main/npm/sails/CVE-2018-21036.yml 38.6.0