CVE-2026-6621 (GCVE-0-2026-6621)

Vulnerability from cvelistv5 – Published: 2026-04-20 08:30 – Updated: 2026-04-20 08:30
VLAI?
Title
1024bit extend-deep index.js prototype pollution
Summary
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.
Severity ?
6.9 (Medium)
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
7.3 (High)
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
7.3 (High)
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
CWE
  • CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes
  • CWE-94 - Code Injection
Assigner
References
Impacted products
Vendor Product Version
1024bit extend-deep Affected: 0.1.0
Affected: 0.1.1
Affected: 0.1.2
Affected: 0.1.3
Affected: 0.1.4
Affected: 0.1.5
Affected: 0.1.6
Create a notification for this product.
Credits
sudosme (VulDB User) VulDB CNA Team
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        "orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
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          "value": "VulDB entry last update"
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      "title": "1024bit extend-deep index.js prototype pollution"
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    "dateReserved": "2026-04-19T16:26:25.296Z",
    "dateUpdated": "2026-04-20T08:30:14.457Z",
    "state": "PUBLISHED"
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  }
}


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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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