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Vulnerability Intelligence

Vulnerability IntelligenceCVE-2026-25047

CVE-2026-25047

CRITICAL9.4

deepHas vulnerable to Prototype Pollution via constructor.prototype

Published Jan 29, 2026

Modified 1 months ago

Details

deepHas provides a test for the existence of a nested object key and optionally returns that key. A prototype pollution vulnerability exists in version 1.0.7 of the deephas npm package that allows an attacker to modify global object behavior. This issue was fixed in version 1.0.8.

References

https://github.com/sharpred/deepHas/commit/8097fafd3776c613d8066546653e0d2c7b5fc465

https://github.com/sharpred/deepHas/security/advisories/GHSA-2733-6c58-pf27

https://www.cve.org/CVERecord?id=CVE-2026-25047

CVSS Analysis

CVSS v4.0

9.4

Exploitability

Attack Vector

LocalAV:L

Attack Complexity

LowAC:L

Attack Requirements

NoneAT:N

Privileges Required

NonePR:N

User Interaction

NoneUI:N

Vulnerable System

Vuln. Confidentiality

HighVC:H

Vuln. Integrity

HighVI:H

Vuln. Availability

HighVA:H

Subsequent System

Subseq. Confidentiality

HighSC:H

Subseq. Integrity

HighSI:H

Subseq. Availability

HighSA:H

9.4/CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Weakness Type (CWE)

Input Validation

Prototype Pollution

Ecosystems

Timeline

PublishedJan 29, 2026

ModifiedFeb 2, 2026

CVE-2026-25047 | Mondoo Vulnerability Intelligence