No exploitation reportedFix available

CVE-2026-2950

Q: Is CVE-2026-2950 actively exploited?

Active exploitation of CVE-2026-2950 has not been confirmed. Its EPSS score was 0.3% on 2026-10-25, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2026-2950?

CVE-2026-2950 has a CVSS v3 base score of 5.3 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

No exploitation reported by the sources we read.

Published2026-03-31
Fixed in4.17.23
WeaknessCWE-1321

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC

2026-03-3120:16CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-25 15:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-2950?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-2950?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV

Lodash

Branch	Affected	Fixed in	Source
4.x	≥ 4.0.0, < 4.17.23	4.17.23	NVD

lodash

Branch	Affected	Fixed in	Source
4.18	< 4.18.0	4.18.0	OSV

Lodash lodash-amd

Branch	Affected	Fixed in	Source
4.x	≥ 4.0.0, < 4.17.23	4.17.23	NVD

5 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Lodash to 4.17.23

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CISA-ADPSSVC decisionnone2026-04-01
OpenCVESSVC decisionnone—
CNACVSS 3.16.5read 2026-10-23
NVDCVSS 3.15.3read 2026-10-23
CNAweakness (CWE)CWE-1321read 2026-10-23
FIRST EPSSEPSS score0.3 %2026-10-25
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Published: 2026-03-31
Last Modified: 2026-10-15
NVD status: Modified

Frequently asked questions

What is CVE-2026-2950?

Is CVE-2026-2950 actively exploited?

Active exploitation of CVE-2026-2950 has not been confirmed. Its EPSS score was 0.3% on 2026-10-25, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-2950?

CVE-2026-2950 has a CVSS v3 base score of 5.3 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

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