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.

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact Partial

Integrity Impact Partial

Availability Impact Partial

AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:UR

This CVE is not in the KEV list.

Exploitation poc

Automatable yes

Technical Impact partial

Affected Vendors & Products

Vendors Products
1024bit
  • Extend-deep

No data.

No data.

References
Link Providers
https://github.com/sudo-secure/security-research/blob/main/extend-deep/prototype-pollution/PoC.md cve-icon cve-icon
https://vuldb.com/submit/792387 cve-icon cve-icon
https://vuldb.com/vuln/358256 cve-icon cve-icon
https://vuldb.com/vuln/358256/cti cve-icon cve-icon
History

Mon, 20 Apr 2026 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Mon, 20 Apr 2026 15:15:00 +0000

Type Values Removed Values Added
First Time appeared 1024bit
1024bit extend-deep
Vendors & Products 1024bit
1024bit extend-deep

Mon, 20 Apr 2026 08:45:00 +0000

Type Values Removed Values Added
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.
Title 1024bit extend-deep index.js prototype pollution
Weaknesses CWE-1321
CWE-94
References
Metrics cvssV2_0

{'score': 7.5, 'vector': 'AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:UR'}

cvssV3_0

{'score': 7.3, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R'}

cvssV3_1

{'score': 7.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R'}

cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P'}
cve-icon MITRE

Status: PUBLISHED

Assigner: VulDB

Published: 2026-04-20T08:30:14.457Z

Updated: 2026-04-20T15:33:04.684Z

Reserved: 2026-04-19T16:26:25.296Z

Link: CVE-2026-6621

cve-icon Vulnrichment

Updated: 2026-04-20T15:32:54.251Z

cve-icon NVD

Status : Received

Published: 2026-04-20T09:16:10.170

Modified: 2026-04-20T09:16:10.170

Link: CVE-2026-6621

cve-icon Redhat

No data.