CVE-2026-4800
lodash vulnerable to Code Injection via `_.template` imports key names
At a glance
- Severity
- HIGH 8.1
- EPSS
- EPSS 2.76 % · percentile 86 (2026-10-27)
- State
- PUBLISHED
- Published
- Updated
- Assigner
- openjs
- NVD status
- Modified
Description
The fix for CVE-2021-23337 added validation for the variable option in _.template but did not apply the same validation to options.imports key names, and both paths flow into the same Function() constructor sink. When an application passes untrusted input as options.imports key names, an attacker can inject default-parameter expressions that execute arbitrary code at template compilation time. Additionally, _.template uses assignInWith to merge imports, which enumerates inherited properties via for..in, so if Object.prototype has been polluted by another vector the polluted keys are copied into the imports object and passed to Function(). The issue is fixed in 4.18.1 for lodash, lodash-es, lodash-amd, and lodash.template. As a workaround, do not pass untrusted input as key names in options.imports; use only developer-controlled, static key names.
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 8.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H | openjs |
| CVSS 3.1 | HIGH 8.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H | redhat-SADP |
| CVSS 3.1 | HIGH 8.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H | NVD · ce714d77-add3-4f53-aff5-83d477b104bb (Secondary) |
| CVSS 3.1 | CRITICAL 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | NVD · nvd@nist.gov (Primary) |
| CVSS 3.1 | HIGH 8.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H | NVD · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Secondary) |
Weaknesses (CWE)
Advisories
- GHSA-r5fr-rjxr-66jc — lodash vulnerable to Code Injection via `_.template` imports key names
European references
- ENISA EUVD · EUVD-2026-17610
- GCVE · GCVE-0-2026-4800
CERT-FR advisories
- CERTFR-2026-AVI-1385 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1378 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1366 — Multiples vulnérabilités dans les produits Splunk · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1256 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1206 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1165 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1056 — Multiples vulnérabilités dans les produits Splunk · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1032 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0958 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0934 — Multiples vulnérabilités dans les produits Atlassian · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0901 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0834 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0698 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0667 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0550 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0523 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0500 — Multiples vulnérabilités dans VMware Tanzu · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:lodash:lodash:*:*:*:*:*:node.js:*:*≥ 4.0.0 < 4.18.0cpe:2.3:a:lodash:lodash-amd:*:*:*:*:*:node.js:*:*≥ 4.0.0 < 4.18.0cpe:2.3:a:lodash:lodash-es:*:*:*:*:*:node.js:*:*≥ 4.0.0 < 4.18.0cpe:2.3:a:lodash:lodash.template:*:*:*:*:*:node.js:*:*≥ 4.0.0 < 4.18.0
Affected products
| Product | Versions |
|---|---|
| lodash · lodash | affected 4.0.0 < 4.18.1 ; unaffected 4.18.1 |
| lodash · lodash-es | affected 4.0.0 < 4.18.1 ; unaffected 4.18.1 |
| lodash · lodash-amd | affected 4.0.0 < 4.18.1 ; unaffected 4.18.1 |
| lodash · lodash.template | affected 4.0.0 < 4.18.1 ; unaffected 4.18.1 |
References
- https://github.com/lodash/lodash/security/advisories/GHSA-r5fr-rjxr-66jc
- https://cna.openjsf.org/security-advisories.html
- https://access.redhat.com/security/cve/CVE-2026-4800
- https://bugzilla.redhat.com/show_bug.cgi?id=2453496
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4800.json
- https://access.redhat.com/errata/RHSA-2026:42078
- https://access.redhat.com/errata/RHSA-2026:24762
- https://access.redhat.com/errata/RHSA-2026:17789
- https://access.redhat.com/errata/RHSA-2026:24331
- https://access.redhat.com/errata/RHBA-2026:21387
- https://access.redhat.com/errata/RHSA-2026:34342
- https://access.redhat.com/errata/RHSA-2026:11470
- https://access.redhat.com/errata/RHSA-2026:10713
- https://access.redhat.com/errata/RHSA-2026:19008
- https://access.redhat.com/errata/RHSA-2026:11493
- https://access.redhat.com/errata/RHSA-2026:11494
- https://access.redhat.com/errata/RHSA-2026:11495
- https://access.redhat.com/errata/RHSA-2026:11454
- https://access.redhat.com/errata/RHSA-2026:11469
- https://access.redhat.com/errata/RHSA-2026:11516
- https://access.redhat.com/errata/RHSA-2026:11471
- https://access.redhat.com/errata/RHSA-2026:10710
- https://access.redhat.com/errata/RHSA-2026:19167
- https://access.redhat.com/errata/RHSA-2026:19409
- https://access.redhat.com/errata/RHSA-2026:19410
- https://access.redhat.com/errata/RHSA-2026:16874
- https://access.redhat.com/errata/RHSA-2026:13553
- https://access.redhat.com/errata/RHSA-2026:13545
- https://access.redhat.com/errata/RHSA-2026:22619
- https://access.redhat.com/errata/RHSA-2026:9742
- https://access.redhat.com/errata/RHSA-2026:13826
- https://access.redhat.com/errata/RHSA-2026:36651
- https://access.redhat.com/errata/RHSA-2026:40945
- https://access.redhat.com/errata/RHSA-2026:40118
- https://access.redhat.com/errata/RHSA-2026:41928
- https://access.redhat.com/errata/RHSA-2026:24977
- https://access.redhat.com/errata/RHSA-2026:19712
- https://access.redhat.com/errata/RHSA-2026:59833
- https://access.redhat.com/errata/RHSA-2026:54188
- https://access.redhat.com/errata/RHSA-2026:56789
- https://access.redhat.com/errata/RHSA-2026:56912
- https://access.redhat.com/errata/RHSA-2026:56854
- https://access.redhat.com/errata/RHSA-2026:36621
- https://access.redhat.com/errata/RHSA-2026:34100
- https://access.redhat.com/errata/RHSA-2026:60023
- https://access.redhat.com/errata/RHSA-2026:17598
- https://access.redhat.com/errata/RHSA-2026:21658
- https://access.redhat.com/errata/RHSA-2026:48699
- https://access.redhat.com/errata/RHSA-2026:17448
- https://access.redhat.com/errata/RHSA-2026:20042
- +30 more
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |