# CVE-2026-6621

> Vulnerability · severity: **HIGH** (CVSS 7.3).

## Description

A vulnerability was determined in 1024bit extend-deep up to 0.1.6. The impacted element is an unknown function of the file index.js. This manipulation of the argument __proto__ causes improperly controlled modification of object prototype attributes. Remote exploitation of the attack is possible. The exploit has been publicly disclosed and may be utilized. The code repository of the project has not been active for many years.

## Key facts

- **CVE ID:** CVE-2026-6621
- **Published:** 2026-04-20
- **CVSS severity:** HIGH
- **CVSS base score:** 7.3
- **CWE codes:** CWE-94, CWE-1321

## Primary sources

- NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-6621

## Citation

> AI Analytics. CVE-2026-6621. Retrieved 2026-08-01 from https://api.ai-analytics.org/cve/CVE-2026-6621. Derived from NIST NVD. Licensed CC0.

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