PT-2026-29328 · Lodash · Lodash+3

Backuardo + 9 · Published 2026-03-31 · Updated 2026-03-31 · CVE-2026-2950

NVD

CVSS v3.1

6.5

Medium

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

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.

Fix

Prototype Pollution

Weakness Enumeration

CWE-1321

Related Identifiers

CVE-2026-2950

Affected Products

Lodash

Lodash-Amd

Lodash-Es

Lodash.Unset

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2026-2950 · Security Note
• https://github.com/lodash/lodash/security/advisories/GHSA-xxjr-mmjv-4gpg · Note