CVE-2026-2950 — lodash vulnerable to Prototype Pollution via array path bypass in `_.unset` and `_.omit`

Affected: lodash, lodash-es, lodash-amd, lodash.unset

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.

USN-8411-1 — node-lodash vulnerabilities

Affected: Ubuntu:Pro:16.04:LTS: node-lodash, Ubuntu:Pro:18.04:LTS: node-lodash, Ubuntu:Pro:20.04:LTS: node-lodash, Ubuntu:Pro:22.04:LTS: node-lodash, Ubuntu:Pro:24.04:LTS: node-lodash, Ubuntu:25.10: node-lodash, Ubuntu:Pro:26.04:LTS: node-lodash

It was discovered that Lodash was vulnerable to a prototype pollution issue in the zipObjectDeep function. An attacker could possibly use this issue to modify application behavior. This issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2020-8203)

Liyuan Chen discovered that Lodash was vulnerable to a regular expression denial of service issue in the toNumber, trim, and trimEnd functions. An attacker could possibly use this issue to consume excessive system resources, resulting in a denial of service. This issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2020-28500)

Marc Hassan discovered that Lodash did not properly sanitize input to the template function. An attacker could possibly use this issue to inject and execute arbitrary commands. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS. (CVE-2021-23337)

It was discovered that Lodash was vulnerable to a prototype pollution issue in the unset and omit functions. An attacker could possibly use this issue to delete properties from global prototypes, resulting in security restrictions being bypassed. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 25.10. (CVE-2025-13465)

It was discovered that Lodash was vulnerable to a prototype pollution issue in the unset and omit functions. An attacker could possibly use this issue to delete properties from built-in prototypes, resulting in security restrictions being…

Most recent entries from all

CVE-2026-2950 — lodash vulnerable to Prototype Pollution via array path bypass in `_.unset` and `_.omit`

USN-8411-1 — node-lodash vulnerabilities