CVE-2026-2950— lodash vulnerable to Prototype Pollution via array path bypass in `_.unset` and `_.omit`
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I. Basic Information for CVE-2026-2950
Vulnerability Information
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Vulnerability Title
lodash vulnerable to Prototype Pollution via array path bypass in `_.unset` and `_.omit`
Source: NVD (National Vulnerability Database)
Vulnerability Description
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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
CWE-1321
Source: NVD (National Vulnerability Database)
Vulnerability Title
lodash 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
lodash是Lodash Utilities开源的一个JavaScript实用程序库。 lodash 4.17.23及之前版本存在安全漏洞，该漏洞源于_.unset和_.omit函数存在原型污染，可能导致删除内置原型的属性。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| lodash | lodash | 4.17.23 ~ 4.18.0 | - | |
| lodash | lodash-es | 4.17.23 ~ 4.18.0 | - | |
| lodash | lodash-amd | 4.17.23 ~ 4.18.0 | - | |
| lodash | lodash.unset | 4.0.0 ~ 4.18.0 | - |
II. Public POCs for CVE-2026-2950
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|---|
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IV. Related Vulnerabilities
Same weakness: CWE-1321
- CVE-2026-42264
Axios: Prototype pollution read-side gadgets in HTTP adapter - CVE-2026-42232
n8n: XML Node Prototype Pollution to RCE - CVE-2026-42231
n8n: Prototype Pollution in XML Webhook Body Parser Leads to - CVE-2026-42077
Evolver: Prototype Pollution via `Object.assign()` in mailbo - CVE-2026-42033
Axios: Prototype Pollution Gadgets - Response Tampering, Dat
V. Comments for CVE-2026-2950
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