HIGH

CVE-2026-25047

deepHas vulnerable to Prototype Pollution via constructor.prototype

CVSS v3

8.8

HIGH

EPSS Score

0.8 %

exploit probability, as of 2026-10-19

CISA KEV

known exploited

Exploitation

none

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

deephasnpmall versions · fixed in 1.0.8

Full record on NVD

Description

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.

Technical details

CVSS v3 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Published: 2026-01-29
Last Modified: 2026-02-25
Exploit-DB: EDB-52528

Frequently asked questions

What is CVE-2026-25047?

Is CVE-2026-25047 actively exploited?

Active exploitation of CVE-2026-25047 has not been confirmed. Its EPSS score was 0.8% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-25047?

CVE-2026-25047 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

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