RCE in 1024bit Extend-deep
CVE-2026-6621
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…
Vulnerability class: RCE (Remote Code Execution)
EPSS: 0.001 (20.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.
Affected products
- 1024bit Extend-deep — versions 0.1.0, 0.1.1, 0.1.2
Weakness classification (CWE)
References
- VDB-358256 | 1024bit extend-deep index.js prototype pollution (technical-description, vdb-entry)
- VDB-358256 | CTI Indicators (IOB, IOC, TTP, IOA) (signature, permissions-required)
- Submit #792387 | 1024bit extend-deep 0.1.6 Prototype Pollution (third-party-advisory)
- cna@vuldb.com (exploit)
Frequently asked questions
- What is CVE-2026-6621?
- CVE-2026-6621 is a high-severity vulnerability in 1024bit Extend-deep, classified under Code Injection. CVSS score: 7.3/10. Published 2026-04-20.
- How severe is CVE-2026-6621?
- High severity. CVSS v3 base score is 7.3 out of 10.