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Vulnerability details: VCID-cfg5-1ju5-73b1
Vulnerability ID VCID-cfg5-1ju5-73b1
Aliases CVE-2019-20922
GHSA-62gr-4qp9-h98f
Summary Uncontrolled Resource Consumption Handlebars before 4.4.5 allows Regular Expression Denial of Service (ReDoS) because of eager matching. The parser may be forced into an endless loop while processing crafted templates. This may allow attackers to exhaust system resources.
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-400 Uncontrolled Resource Consumption
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
cvssv3 7.5 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-20922.json
epss 0.00291 https://api.first.org/data/v1/epss?cve=CVE-2019-20922
epss 0.00291 https://api.first.org/data/v1/epss?cve=CVE-2019-20922
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-62gr-4qp9-h98f
cvssv3.1 7.5 https://github.com/handlebars-lang/handlebars.js/commit/8d5530ee2c3ea9f0aee3fde310b9f36887d00b8b
generic_textual HIGH https://github.com/handlebars-lang/handlebars.js/commit/8d5530ee2c3ea9f0aee3fde310b9f36887d00b8b
cvssv3.1 7.5 https://nvd.nist.gov/vuln/detail/CVE-2019-20922
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2019-20922
cvssv3.1 7.5 https://snyk.io/vuln/SNYK-JS-HANDLEBARS-480388
generic_textual HIGH https://snyk.io/vuln/SNYK-JS-HANDLEBARS-480388
cvssv3.1 7.5 https://www.npmjs.com/advisories/1300
generic_textual HIGH https://www.npmjs.com/advisories/1300
cvssv3.1 7.5 https://www.npmjs.com/package/handlebars
generic_textual HIGH https://www.npmjs.com/package/handlebars
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-20922.json
https://api.first.org/data/v1/epss?cve=CVE-2019-20922
https://github.com/handlebars-lang/handlebars.js/commit/8d5530ee2c3ea9f0aee3fde310b9f36887d00b8b
https://snyk.io/vuln/SNYK-JS-HANDLEBARS-480388
https://www.npmjs.com/advisories/1300
https://www.npmjs.com/package/handlebars
1882256 https://bugzilla.redhat.com/show_bug.cgi?id=1882256
CVE-2019-20922 https://nvd.nist.gov/vuln/detail/CVE-2019-20922
GHSA-62gr-4qp9-h98f https://github.com/advisories/GHSA-62gr-4qp9-h98f
RHSA-2020:5179 https://access.redhat.com/errata/RHSA-2020:5179
RHSA-2021:2500 https://access.redhat.com/errata/RHSA-2021:2500
RHSA-2021:3917 https://access.redhat.com/errata/RHSA-2021:3917
RHSA-2023:1334 https://access.redhat.com/errata/RHSA-2023:1334
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://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-20922.json
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/handlebars-lang/handlebars.js/commit/8d5530ee2c3ea9f0aee3fde310b9f36887d00b8b
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-2019-20922
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://snyk.io/vuln/SNYK-JS-HANDLEBARS-480388
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://www.npmjs.com/advisories/1300
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://www.npmjs.com/package/handlebars
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 0.52739
EPSS Score 0.00291
Published At June 4, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-02T04:41:31.208313+00:00 GitLab Importer Import https://gitlab.com/gitlab-org/advisories-community/-/blob/main/npm/handlebars/CVE-2019-20922.yml 38.6.0