CVE-2026-4800 (GCVE-0-2026-4800)

Vulnerability from cvelistv5 – Published: 2026-03-31 19:25 – Updated: 2026-03-31 20:37
VLAI?
Title
lodash vulnerable to Code Injection via `_.template` imports key names
Summary
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.
Severity ?
8.1 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-94 - Improper Control of Generation of Code ('Code Injection')
Assigner
References
Impacted products
Vendor Product Version
lodash lodash Affected: 4.0.0 , < 4.18.0 (semver)
Unaffected: 4.18.0 (semver)
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    lodash lodash-es Affected: 4.0.0 , < 4.18.0 (semver)
Unaffected: 4.18.0 (semver)
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    lodash lodash-amd Affected: 4.0.0 , < 4.18.0 (semver)
Unaffected: 4.18.0 (semver)
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    lodash lodash.template Affected: 4.0.0 , < 4.18.0 (semver)
Unaffected: 4.18.0 (semver)
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Credits
dolevmiz1 bugbunny-research M0nd0R UlisesGascon falsyvalues jonchurch threalwinky jdalton
Show details on NVD website
To clipboard 

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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