CVE-2026-2950
MEDIUM
MEDIUM
Priority: 0.02
BB Relevance:
71/100
Published: 2026-03-31
Modified: 2026-11-13
First seen: 2026-11-03
Status: active
Attack Surface
Network
Low Complexity
No Auth
No Interaction
CVSS Vector Breakdown
AV:
Network
AC:
Low
PR:
None
UI:
None
S:
Unchanged
C:
None
I:
Low
A:
None
Description
The _.unset and _.omit functions in Lodash are vulnerable to prototype pollution. The fix for CVE-2025-13465 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. The issue is patched from 4.18.0 to 4.18.1 depending on the package: lodash, lodash-es, and lodash-amd in 4.18.1, and the standalone lodash.unset and lodash.omit packages in 4.18.0.
Weakness Classification (1)
Affected Software (5)
| Vendor | Product | Version |
|---|---|---|
| lodash | lodash | 4.17.23 – 4.18.1 |
| lodash | lodash-amd | 4.17.23 – 4.18.1 |
| lodash | lodash-es | 4.17.23 – 4.18.1 |
| lodash | lodash.omit | < 4.18.0 |
| lodash | lodash.unset | < 4.18.0 |
References & Advisories (2)
Vendor Advisory
Vendor Advisory
Change History
| Field | Old Value | New Value | Detected |
|---|---|---|---|
| cvss_base | 6.5 | 5.3 | 2026-11-13T19:30 |