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CVE-2026-6621

1024bit extend-deep index.js prototype pollution

Published: Apr 20, 2026Updated: Apr 20, 2026 Sources: CVE List NVD
NVD MITRE
7.3CVSS
HIGH

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.

EPSS Score
N/A
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:LI:LA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:LAvailability
Low

Weaknesses

CWE-94CWE-1321

Affected Products

extend-deep
1024bit

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

MITRE ATT&CK

2 techniques
Execution
Initial Access
View detailed technique mapping

References

https://vuldb.com/vuln/358256
vuldb.com
https://vuldb.com/vuln/358256/cti
vuldb.com
https://vuldb.com/submit/792387
vuldb.com
and 1 more references View all →

Timeline

Published
Apr 20, 2026
Last Updated
Apr 20, 2026

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