Package Instance

lodash vulnerable to Code Injection via `_.template` imports key names
### 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.

The fix applies two changes:
1. Validate `importsKeys` against the existing `reForbiddenIdentifierChars` regex (same check already used for the `variable` option)
2. Replace `assignInWith` with `assignWith` when merging imports, so only own properties are enumerated

### Workarounds

Do not pass untrusted input as key names in `options.imports`. Only use developer-controlled, static key names.

lodash vulnerable to Prototype Pollution via array path bypass in `_.unset` and `_.omit`
### 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.