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This CVE record has been updated after NVD enrichment efforts were completed. Enrichment data supplied by the NVD may require amendment due to these changes.
Description
Impact:
The fix for CVE-2021-23337 (https://github.com/advisories/GHSA-35jh-r3h4-6jhm) added validation for the variable option in _.template but did not apply the same validation to options.imports key names. 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. If Object.prototype has been polluted by any other vector, the polluted keys are copied into the imports object and passed to Function().
Patches:
Users should upgrade to version 4.18.0.
Workarounds:
Do not pass untrusted input as key names in options.imports. Only use developer-controlled, static key names.
Metrics
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OR
*cpe:2.3:a:lodash:lodash:*:*:*:*:*:node.js:*:* versions up to (excluding) 4.17.21
*cpe:2.3:a:lodash:lodash-es:*:*:*:*:*:node.js:*:* versions up to (excluding) 4.17.21
*cpe:2.3:a:lodash:lodash-rails:*:*:*:*:*:ruby:*:* versions up to (excluding) 4.17.21
*cpe:2.3:a:lodash:lodash.template:*:*:*:*:*:node.js:*:* versions up to (including) 4.5.0
OR
*cpe:2.3:a:lodash:lodash:*:*:*:*:*:node.js:*:* versions from (including) 4.0.0 up to (excluding) 4.18.0
*cpe:2.3:a:lodash:lodash-amd:*:*:*:*:*:node.js:*:* versions from (including) 4.0.0 up to (excluding) 4.18.0
*cpe:2.3:a:lodash:lodash-es:*:*:*:*:*:node.js:*:* versions from (including) 4.0.0 up to (excluding) 4.18.0
*cpe:2.3:a:lodash:lodash.template:*:*:*:*:*:node.js:*:* versions from (including) 4.0.0 up to (excluding) 4.18.0
Changed
Reference Type
openjs: https://github.com/advisories/GHSA-35jh-r3h4-6jhm Types: Third Party Advisory
openjs: https://github.com/advisories/GHSA-35jh-r3h4-6jhm Types: Not Applicable
openjs: https://github.com/lodash/lodash/commit/3469357cff396a26c363f8c1b5a91dde28ba4b1c Types: Not Applicable
Initial Analysis by NIST4/07/2026 11:43:13 AM
Action
Type
Old Value
New Value
Added
CVSS V3.1
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Added
CPE Configuration
OR
*cpe:2.3:a:lodash:lodash:*:*:*:*:*:node.js:*:* versions up to (excluding) 4.17.21
*cpe:2.3:a:lodash:lodash-es:*:*:*:*:*:node.js:*:* versions up to (excluding) 4.17.21
*cpe:2.3:a:lodash:lodash-rails:*:*:*:*:*:ruby:*:* versions up to (excluding) 4.17.21
*cpe:2.3:a:lodash:lodash.template:*:*:*:*:*:node.js:*:* versions up to (including) 4.5.0
Added
Reference Type
openjs: https://cna.openjsf.org/security-advisories.html Types: Third Party Advisory
Added
Reference Type
openjs: https://github.com/advisories/GHSA-35jh-r3h4-6jhm Types: Third Party Advisory
Impact:
The fix for CVE-2021-23337 (https://github.com/advisories/GHSA-35jh-r3h4-6jhm) added validation for the variable option in _.template but did not apply the same validation to options.imports key names. 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. If Object.prototype has been polluted by any other vector, the polluted keys are copied into the imports object and passed to Function().
Patches:
Users should upgrade to version 4.18.0.
Workarounds:
Do not pass untrusted input as key names in options.imports. Only use developer-controlled, static key names.
) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.
