CVE catalog

CVE-2026-2950

Severity: High · CVSS 8.1
Published: Jan 21, 2026, 8:16:05 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.33% · Oct 25, 2026

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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	node-lodash	sid	`4.18.1+dfsg1-2`	fixed
Debian	node-lodash	forky	`4.18.1+dfsg1-2`	fixed
Debian	node-lodash	trixie	`4.17.21+dfsg+~cs8.31.198.20210220-9+deb13u1`	fixed
Debian	node-lodash	bookworm	`4.17.21+dfsg+~cs8.31.198.20210220-9`	vulnerable
Debian	node-lodash	bookworm-security	`4.17.21+dfsg+~cs8.31.198.20210220-9+deb12u1`	fixed
Cpe	node-lodash	Not reported	`4.17.21+dfsg+~cs8.31.198.20210220-9ubuntu0.24.04.1~esm1`	fixed
Cpe	libjs-lodash	Not reported	`4.17.21+dfsg+~cs8.31.198.20210220-9ubuntu0.24.04.1~esm1`	fixed
Cpe	node-lodash-packages	Not reported	`4.17.21+dfsg+~cs8.31.198.20210220-9ubuntu0.24.04.1~esm1`	fixed
Cpe	node-lodash	Not reported	Not reported	vulnerable
Cpe	lodash	Not reported	`4.17.23`	fixed
Cpe	lodash-amd	Not reported	`4.17.23`	fixed
Cpe	lodash-es	Not reported	`4.17.23`	fixed
Cpe	lodash.unset	Not reported	Not reported	unknown
Npm	lodash	Not reported	`4.18.0`	fixed
Npm	lodash-es	Not reported	`4.18.0`	fixed
Npm	lodash-amd	Not reported	`4.18.0`	fixed
Npm	lodash.unset	Not reported	`4.18.0`	fixed
Cpe	lodash	Not reported	`4.17.23`	fixed
Cpe	lodash-amd	Not reported	`4.17.23`	fixed
Cpe	lodash-es	Not reported	`4.17.23`	fixed
Cpe	lodash.unset	Not reported	Not reported	unknown
Npm	lodash	Not reported	`4.17.23`	fixed
Npm	lodash.unset	Not reported	Not reported	unknown
Npm	lodash-es	Not reported	`4.17.23`	fixed
Npm	lodash-amd	Not reported	`4.17.23`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	node-lodash	source	sid	`4.18.1+dfsg-1`	not yet assigned	Not reported	Not reported
Debian	node-lodash	source	forky	`4.18.1+dfsg-1`	not yet assigned	Not reported	Not reported
Debian	node-lodash	source	trixie	`4.17.21+dfsg+~cs8.31.198.20210220-9+deb13u1`	not yet assigned	Not reported	Not reported
Debian	node-lodash	source	bookworm	`4.17.21+dfsg+~cs8.31.198.20210220-9+deb12u1`	not yet assigned	Not reported	Not reported
Cpe	node-lodash	cpe	Not reported	`4.17.21+dfsg+~cs8.31.198.20210220-9ubuntu0.24.04.1~esm1`	Not reported	Not reported	Not reported
Cpe	libjs-lodash	cpe	Not reported	`4.17.21+dfsg+~cs8.31.198.20210220-9ubuntu0.24.04.1~esm1`	Not reported	Not reported	Not reported
Cpe	node-lodash-packages	cpe	Not reported	`4.17.21+dfsg+~cs8.31.198.20210220-9ubuntu0.24.04.1~esm1`	Not reported	Not reported	Not reported
Cpe	lodash	cpe	Not reported	`4.17.23`	Not reported	Not reported	Not reported
Cpe	lodash-amd	cpe	Not reported	`4.17.23`	Not reported	Not reported	Not reported
Cpe	lodash-es	cpe	Not reported	`4.17.23`	Not reported	Not reported	Not reported
Npm	lodash	npm	Not reported	`4.18.0`	Not reported	GHSA-F23M-R3PF-42RH	Not reported
Npm	lodash-es	npm	Not reported	`4.18.0`	Not reported	GHSA-F23M-R3PF-42RH	Not reported
Npm	lodash-amd	npm	Not reported	`4.18.0`	Not reported	GHSA-F23M-R3PF-42RH	Not reported
Npm	lodash.unset	npm	Not reported	`4.18.0`	Not reported	GHSA-F23M-R3PF-42RH	Not reported
Cpe	lodash	cpe	Not reported	`4.17.23`	Not reported	NVD-CVE-2026-2950	Not reported
Cpe	lodash-amd	cpe	Not reported	`4.17.23`	Not reported	NVD-CVE-2026-2950	Not reported
Cpe	lodash-es	cpe	Not reported	`4.17.23`	Not reported	NVD-CVE-2026-2950	Not reported
Npm	lodash	npm	Not reported	`4.17.23`	Not reported	GHSA-XXJR-MMJV-4GPG	Not reported
Npm	lodash-es	npm	Not reported	`4.17.23`	Not reported	GHSA-XXJR-MMJV-4GPG	Not reported
Npm	lodash-amd	npm	Not reported	`4.17.23`	Not reported	GHSA-XXJR-MMJV-4GPG	Not reported

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[libjs-lodash]Affected
Source package: [node-lodash]
Details (2)
- 4.17.21+dfsg+~cs8.31.198.20210220-9 · all · bookworm
  Affected · Fixed: 4.17.21+dfsg+~cs8.31.198.20210220-9+deb12u1
  nvd · node-lodash · debian · bookworm
- 4.17.21+dfsg+~cs8.31.198.20210220-9 · all · bookworm
  Affected · Fixed: 4.17.21+dfsg+~cs8.31.198.20210220-9+deb12u1
  nvd · node-lodash · debian · bookworm
[node-lodash]Affected
Details (2)
- 4.17.21+dfsg+~cs8.31.198.20210220-9 · all · bookworm
  Affected · Fixed: 4.17.21+dfsg+~cs8.31.198.20210220-9+deb12u1
  nvd · node-lodash · debian · bookworm
- 4.17.21+dfsg+~cs8.31.198.20210220-9 · all · bookworm
  Affected · Fixed: 4.17.21+dfsg+~cs8.31.198.20210220-9+deb12u1
  nvd · node-lodash · debian · bookworm
[node-lodash-packages]Affected
Source package: [node-lodash]
Details (2)
- 4.17.21+dfsg+~cs8.31.198.20210220-9 · all · bookworm
  Affected · Fixed: 4.17.21+dfsg+~cs8.31.198.20210220-9+deb12u1
  nvd · node-lodash · debian · bookworm
- 4.17.21+dfsg+~cs8.31.198.20210220-9 · all · bookworm
  Affected · Fixed: 4.17.21+dfsg+~cs8.31.198.20210220-9+deb12u1
  nvd · node-lodash · debian · bookworm

Observed: Oct 24, 2026, 2:00:28 AM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [Ubuntu Security Notices (USN)]