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.
Analysis
No analysis available yet.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||
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| lodash | lodash | unaffected |
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| lodash | lodash-es | unaffected |
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| lodash | lodash-amd | unaffected |
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| lodash | lodash.unset | unaffected |
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Tracking
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Wed, 01 Apr 2026 02:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | lodash vulnerable to Prototype Pollution via array path bypass in `_.unset` and `_.omit` | |
| Weaknesses | CWE-1321 | |
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| Metrics |
cvssV3_1
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Subscriptions
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MITRE
Status: PUBLISHED
Assigner: openjs
Published:
Updated: 2026-03-31T19:18:35.796Z
Reserved: 2026-02-21T20:04:35.087Z
Link: CVE-2026-2950
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-03-31T20:16:26.207
Modified: 2026-03-31T20:16:26.207
Link: CVE-2026-2950
Redhat
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OpenCVE Enrichment
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