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CVE-2026-2950

lodash vulnerable to Prototype Pollution via array path bypass in `_.unset` and `_.omit`

Published: Mar 31, 2026Updated: Jul 24, 2026 Sources: CVE List NVDCWE-1321
6.5MEDIUM
NVD MITRE
EPSS Score
0.3%
Top 75.9%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:LA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:LIntegrity
Low
A:LAvailability
Low
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Weaknesses

CWE-1321

Affected Products

lodash
oss-projectaka lodash-amd, lodash-es
lodashLibrary
OSS Libraries / npm
lodash-amdLibrary
OSS Libraries / npm
lodash-esLibrary
OSS Libraries / npm
lodash.unsetLibrary
OSS Libraries / npm

Exploitability

Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Execution
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References

https://github.com/lodash/lodash/security/advisories/GHSA-xxjr-mmjv-4gpg
github.com

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