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Verdict

MEDIUM SEVERITY (CVSS 6.5)

What is this: 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: h… (CWE-1321) Affects Lodash Lodash.
Should you care: Rated medium severity — CVSS 6.5.
What to do: Patch when able.

OBSERVEDMODERATE EVIDENCE COVERAGEDeterministic · stored evidence only

Vulnerability investigation

Prioritize by applicability, impact, and exploitation evidence

The available snapshot does not list this vulnerability in CISA KEV; that is not proof exploitation has not occurred. NVD rates the technical severity medium at CVSS 6.5. These are public vulnerability signals, not proof that a specific environment runs an affected version.

Exploitation status

No KEV listing in available snapshot

Absence from KEV does not establish absence of exploitation.

30-day exploitation likelihood

Unavailable

FIRST EPSS did not return a score.

Technical severity

6.5 · medium

NVD base score; exploit likelihood is measured separately.

Affected surface

4 parsed products

Lodash Lodash, Lodash Lodash-Amd, Lodash Lodash-Es

Weakness class

CWE-1321

CWE describes the weakness category, not whether a deployed product is reachable or exploitable.

Corpus evidence

1 connectors · 1 citations

No related report text is available in the local corpus.

What the evidence supports

Findings stay bounded to named sources and observable infrastructure.

2 findings

CVSS 6.5 medium technical impact

HIGH

NVD supplies a verified base score, but structured attack prerequisites are not stored for this record.

NIST NVD CVSS

CVSS measures technical severity and prerequisites; it does not measure observed exploitation likelihood.

4 affected product mappings

MODERATE

Lodash Lodash, Lodash Lodash-Amd, Lodash Lodash-Es, Lodash Lodash.Unset

NVD CPE / CISA product metadata

Product names are candidate applicability pivots. Confirm exact deployed versions and vendor ranges before remediation decisions.

What remains unknown

Whether your environment runs an affected product and version is not established by this public lookup.
Reachability, compensating controls, and successful exploitation in a specific environment are not checked.
Structured attack vector, privileges, complexity, and user-interaction prerequisites are incomplete for this record.
CISA KEV absence is a point-in-time catalog result, not evidence that exploitation has never occurred.
No locally ingested public report supplies exploit, actor, or campaign context for this CVE.

What this is

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.

Evidence readiness

The base CVE appears first. Independent evidence is added without blocking the page.

Investigation status

Checking for newly completed evidence

Refreshing

NIST NVD

NVD evidence is available in this response

Ready

CISA KEV

Known-exploitation catalog check is pending

Pending

FIRST EPSS

Forensia does not request or publish EPSS while source rights are under review

Rights pending

Reports

Report links are still being resolved

Pending

Relationships

Product and vulnerability relationships are still being prepared

Pending

Vulnerability intel

Local EPSS row, KEV flag, and catalog notes from stored metadata only.

Not in KEV

CVE: CVE-2026-2950
EPSS probability: not fetched / unavailable
EPSS fetched_at: 2026-08-11T10:44:17.711697Z

Affected products

Vendor/product strings parsed from local CPE URIs (no inferred ATT&CK).

Product	CPE (truncated)
Lodash Lodash.Unset	cpe:2.3:a:lodash:lodash.unset::::::node.js::*
Lodash Lodash-Es	cpe:2.3:a:lodash:lodash-es::::::node.js::*
Lodash Lodash-Amd	cpe:2.3:a:lodash:lodash-amd::::::node.js::*
Lodash Lodash	cpe:2.3:a:lodash:lodash::::::node.js::*

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