| Package | Affected versions | Patched versions |
|---|---|---|
| lodash | ≥ 4.0.0, < 4.17.23 | 4.17.23 |
| lodash-amd | ≥ 4.0.0, < 4.17.23 | 4.17.23 |
| lodash-es | ≥ 4.0.0, < 4.17.23 | 4.17.23 |
| lodash.unset | ≥ 4.0.0 | |
| lodash | < 4.18.0 | 4.18.0 |
| lodash-amd | < 4.18.0 | 4.18.0 |
| lodash-es | < 4.18.0 | 4.18.0 |
| lodash.unset | ≥ 4.0.0, < 4.18.0 | 4.18.0 |
Lodash versions 4.17.23 and earlier are vulnerable to prototype pollution in the _.unset and _.omit functions. The fix for CVE-2025-13465 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.
This issue is patched in 4.18.0.
None. Upgrade to the patched version.
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