CVE-2026-78654 (GCVE-0-2026-78654)

Vulnerability from cvelistv5 – Published: 2026-08-25 06:00 – Updated: 2026-08-25 13:17 X_Open Source
VLAI
Title
cleverbrush framework/deep deepExtend.ts deepExtend prototype pollution
Summary
A vulnerability has been found in cleverbrush framework and deep up to 4.4.0. This impacts the function deepExtend of the file libs/deep/src/deepExtend.ts. The manipulation leads to improperly controlled modification of object prototype attributes. Remote exploitation of the attack is possible. The exploit has been disclosed to the public and may be used. Upgrading to version 4.4.1 will fix this issue. The identifier of the patch is 810398c1308c500c3b8b6af380b5a89371389327. You should upgrade the affected component.
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 13:17 UTC
CWE
  • CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes
  • CWE-94 - Code Injection
Impacted products
Vendor Product Version CPE status
cleverbrush framework Affected: 4.0
Affected: 4.1
Affected: 4.2
Affected: 4.3
Affected: 4.4.0
Unaffected: 4.4.1
    cpe:2.3:a:cleverbrush:framework:*:*:*:*:*:*:*:*
Create a notification for this product.
cleverbrush deep Affected: 4.0
Affected: 4.1
Affected: 4.2
Affected: 4.3
Affected: 4.4.0
Unaffected: 4.4.1
    cpe:2.3:a:cleverbrush:deep:*:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website

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                "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C",
                "version": "3.0"
              }
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              "cvssV2_0": {
                "baseScore": 7.5,
                "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:OF/RC:C",
                "version": "2.0"
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            }
          ],
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              "descriptions": [
                {
                  "cweId": "CWE-1321",
                  "description": "Improperly Controlled Modification of Object Prototype Attributes",
                  "lang": "en",
                  "type": "CWE"
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              ]
            },
            {
              "descriptions": [
                {
                  "cweId": "CWE-94",
                  "description": "Code Injection",
                  "lang": "en",
                  "type": "CWE"
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          "providerMetadata": {
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          },
          "references": [
            {
              "name": "VDB-394866 | cleverbrush framework/deep deepExtend.ts deepExtend prototype pollution",
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            },
            {
              "name": "VDB-394866 | CTI Indicators (IOB, IOC, TTP, IOA)",
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                "permissions-required"
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            },
            {
              "tags": [
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                "issue-tracking"
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            },
            {
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              "tags": [
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              "url": "https://github.com/cleverbrush/framework/"
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          ],
          "tags": [
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          "timeline": [
            {
              "lang": "en",
              "time": "2026-08-24T02:00:00.000Z",
              "value": "VulDB entry created"
            },
            {
              "lang": "en",
              "time": "2026-08-25T00:00:00.000Z",
              "value": "Advisory disclosed"
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            {
              "lang": "en",
              "time": "2026-08-25T01:13:27.000Z",
              "value": "VulDB entry last update"
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          ],
          "title": "cleverbrush framework/deep deepExtend.ts deepExtend prototype pollution",
          "x_generator": [
            "VulDB PVTS v202608"
          ]
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      },
      "cveMetadata": {
        "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
        "assignerShortName": "VulDB",
        "cveId": "CVE-2026-78654",
        "datePublished": "2026-08-25T06:00:13.406Z",
        "dateReserved": "2026-08-24T23:08:18.011Z",
        "dateUpdated": "2026-08-25T13:17:33.100Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.
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  • 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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Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.


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