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Vulnerability details: VCID-bkew-8c9k-mbh2
Vulnerability ID VCID-bkew-8c9k-mbh2
Aliases CVE-2026-33938
GHSA-3mfm-83xf-c92r
Summary handlebars: Handlebars: Arbitrary code execution via @partial-block overwrite
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (5)
CWE-917 Improper Neutralization of Special Elements used in an Expression Language Statement ('Expression Language Injection')
CWE-843 Access of Resource Using Incompatible Type ('Type Confusion')
CWE-94 Improper Control of Generation of Code ('Code Injection')
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
cvssv3 8.1 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-33938.json
epss 0.00048 https://api.first.org/data/v1/epss?cve=CVE-2026-33938
cvssv3.1 8.1 https://github.com/handlebars-lang/handlebars.js
generic_textual HIGH https://github.com/handlebars-lang/handlebars.js
cvssv3.1 8.1 https://github.com/handlebars-lang/handlebars.js/commit/68d8df5a88e0a26fe9e6084c5c6aaebe67b07da2
generic_textual HIGH https://github.com/handlebars-lang/handlebars.js/commit/68d8df5a88e0a26fe9e6084c5c6aaebe67b07da2
ssvc Track* https://github.com/handlebars-lang/handlebars.js/commit/68d8df5a88e0a26fe9e6084c5c6aaebe67b07da2
cvssv3.1 8.1 https://github.com/handlebars-lang/handlebars.js/releases/tag/v4.7.9
generic_textual HIGH https://github.com/handlebars-lang/handlebars.js/releases/tag/v4.7.9
ssvc Track* https://github.com/handlebars-lang/handlebars.js/releases/tag/v4.7.9
cvssv3.1 8.1 https://github.com/handlebars-lang/handlebars.js/security/advisories/GHSA-3mfm-83xf-c92r
generic_textual HIGH https://github.com/handlebars-lang/handlebars.js/security/advisories/GHSA-3mfm-83xf-c92r
ssvc Track* https://github.com/handlebars-lang/handlebars.js/security/advisories/GHSA-3mfm-83xf-c92r
cvssv3.1 8.1 https://nvd.nist.gov/vuln/detail/CVE-2026-33938
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2026-33938
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-33938.json
https://api.first.org/data/v1/epss?cve=CVE-2026-33938
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-33938
https://github.com/handlebars-lang/handlebars.js
https://github.com/handlebars-lang/handlebars.js/commit/68d8df5a88e0a26fe9e6084c5c6aaebe67b07da2
https://github.com/handlebars-lang/handlebars.js/releases/tag/v4.7.9
https://github.com/handlebars-lang/handlebars.js/security/advisories/GHSA-3mfm-83xf-c92r
https://nvd.nist.gov/vuln/detail/CVE-2026-33938
1132141 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1132141
2452525 https://bugzilla.redhat.com/show_bug.cgi?id=2452525
GHSA-3mfm-83xf-c92r https://github.com/advisories/GHSA-3mfm-83xf-c92r
RHSA-2026:10175 https://access.redhat.com/errata/RHSA-2026:10175
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-33938.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:H/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://github.com/handlebars-lang/handlebars.js
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:N/S:U/C:H/I:H/A:H Found at https://github.com/handlebars-lang/handlebars.js/commit/68d8df5a88e0a26fe9e6084c5c6aaebe67b07da2
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: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2026-03-31T18:39:18Z/ Found at https://github.com/handlebars-lang/handlebars.js/commit/68d8df5a88e0a26fe9e6084c5c6aaebe67b07da2
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://github.com/handlebars-lang/handlebars.js/releases/tag/v4.7.9
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: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2026-03-31T18:39:18Z/ Found at https://github.com/handlebars-lang/handlebars.js/releases/tag/v4.7.9
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://github.com/handlebars-lang/handlebars.js/security/advisories/GHSA-3mfm-83xf-c92r
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: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2026-03-31T18:39:18Z/ Found at https://github.com/handlebars-lang/handlebars.js/security/advisories/GHSA-3mfm-83xf-c92r
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2026-33938
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 0.15242
EPSS Score 0.00048
Published At June 5, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-04T16:31:58.801921+00:00 RedHat Importer Import https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-33938.json 38.6.0