CVE-2026-6621
High
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.
SeverityHigh
CVSS7.3
Exploit probability—
Product1024bit Extend-deep
PublishedApr 20, 2026
First seenApr 20, 2026
Weakness typeCWE-1321Prototype pollutionCWE-94Code injection
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| 1024bit extend-deep | 0.1.0, 0.1.1, 0.1.2, 0.1.3, 0.1.4, 0.1.5, 0.1.6 | — |
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