Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
CVE-2026-2950
lodash vulnerable to Prototype Pollution via array path bypass in `_.unset` and `_.omit`
AV AC PR UI S C I A CVSS EPSS %ile KEV
N L N N U N L N 5.3 .0040 32.9 —
AFFECTED
Product Versions Fixed
lodash 4.17.23 – 4.18.1
lodash-es 4.17.23 – 4.18.1
lodash-amd 4.17.23 – 4.18.1
lodash.unset unspecified 4.18.0
lodash.omit unspecified 4.18.0
TIMELINE
Feb 21 Reserved by openjs
Mar 31 Published (CNA: openjs)
Oct 15 RESCORED — CVE-2026-2950 (lodash). CVSS 6.5 → 5.3 (NVD).
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.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
|---|
| February 21, 2026 | Reserved | Reserved by openjs |
| March 31, 2026 | Published | Published (CNA: openjs) |
| October 15, 2026 | RESCORED | RESCORED — CVE-2026-2950 (lodash). CVSS 6.5 → 5.3 (NVD). |
Affected
Affected products and packages — 5 rows
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| lodash | lodash | — | 4.17.23 | 4.18.1 |
| lodash | lodash-es | — | 4.17.23 | 4.18.1 |
| lodash | lodash-amd | — | 4.17.23 | 4.18.1 |
| lodash | lodash.unset | — | — | 4.18.0 |
| lodash | lodash.omit | — | — | 4.18.0 |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-2950 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
