Lodash

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.

Published: 2026-03-31T19:25:55.987Z
Updated: 2026-08-26T12:04:55.499Z

Impact: Lodash versions 4.17.23 and earlier are vulnerable to prototype pollution in the _.unset and _.omit functions. The fix for (CVE-2025-13465: https://github.com/lodash/lodash/security/advisories/GHSA-xxjr-mmjv-4gpg) only guards against string key members, so an attacker can bypass the check by passing array-wrapped path segments. This allows deletion of properties from built-in prototypes such as Object.prototype, Number.prototype, and String.prototype. The issue permits deletion of prototype properties but does not allow overwriting their original behavior. Patches: This issue is patched in 4.18.0. Workarounds: None. Upgrade to the patched version.

Published: 2026-03-31T19:18:35.796Z
Updated: 2026-04-01T13:43:21.491Z

Lodash versions 4.0.0 through 4.17.22 are vulnerable to prototype pollution in the _.unset and _.omit functions. An attacker can pass crafted paths which cause Lodash to delete methods from global prototypes. The issue permits deletion of properties but does not allow overwriting their original behavior. This issue is patched on 4.17.23

Published: 2026-01-21T19:05:28.846Z
Updated: 2026-08-26T12:04:59.669Z

Lodash versions prior to 4.17.21 are vulnerable to Command Injection via the template function.

Published: 2021-02-15T12:15:14.715Z
Updated: 2024-09-16T19:15:17.074Z

Prototype pollution attack when using _.zipObjectDeep in lodash before 4.17.20.

Published: 2020-07-15T16:10:27.000Z
Updated: 2024-08-04T09:56:28.214Z