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CVE-2025-13465

Medium

Description

The _.unset and _.omit functions in Lodash are vulnerable to prototype pollution. An attacker can pass crafted paths which cause Lodash to delete methods from global prototypes. The issue permits deletion of properties but does not allow overwriting their original behavior. The issue is patched from 4.17.23 to 4.18.0 depending on the package: lodash, lodash-es, and lodash-amd in 4.17.23, and the standalone lodash.unset and lodash.omit packages in 4.18.0.

SeverityMedium
CVSS5.3
Exploit probability—
ProductLodash
PublishedJan 21, 2026
First seenJan 21, 2026
Weakness typeCWE-1321Prototype pollution

How to fix

Update
  • lodash lodash4.17.23 or later
  • lodash4.17.23 or later
  • lodash.unset4.18.0 or later
  • lodash-es4.17.23 or later
  • lodash-amd4.17.23 or later
  • lodash.omit4.18.0 or later
Vendor advisories

Affected products

ProductAffected versionsFixed in
lodash lodash4.0.0 ≤ v < 4.17.234.17.23
lodashnpm4.0.0 ≤ v < 4.17.23, 4.0.0 ≤ v ≤ 4.17.224.17.23
lodash.unsetnpm4.0.0 ≤ v ≤ 4.5.2, 4.0.0 ≤ v < 4.18.04.18.0
lodash-esnpm4.0.0 ≤ v < 4.17.234.17.23
lodash-amdnpm4.0.0 ≤ v < 4.17.23, 4.0.0 ≤ v ≤ 4.17.224.17.23
lodash.omitnpm4.0.0 ≤ v < 4.18.04.18.0

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