Vulnerability-Lookup

CVE-2026-106550 (GCVE-0-2026-106550)

Vulnerability from cvelistv5 – Published: 2026-10-06 20:09 – Updated: 2026-10-07 15:05

Title

CVE-2026-106550

Summary

Mozilla's Node-convict (version 6.2.2 and later) is vulnerable to a Denial of Service vulnerability caused by incomplete prototype‑pollution protections in config.set(). An attacker controlling the configuration key can write arbitrary properties to constructor.<key>, which walk() resolves to the global Object function. This allows overwriting core JavaScript methods such as Object.assign, leading to persistent process-wide failures and requiring a restart. The issue bypasses existing filters that only block constructor.prototype.* and __proto__.*. Exploitation requires an endpoint that forwards attacker-controlled keys into config.set().

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-07 15:05 UTC

CWE

CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes (‘Prototype Pollution’)
CWE-915 - Improperly Controlled Modification of Dynamically-Determined Object Attributes
CWE-400 - Uncontrolled Resource Consumption (‘Denial of Service’)
CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
CWE-400 - Uncontrolled Resource Consumption

Assigner

certcc mitre root Scorecard

References

1 reference

URL	Tags
https://github.com/mozilla/node-convict

Impacted products

1 product

Vendor	Product	Version	CPE status
Mozilla	Node-convict	Affected: 6.2.2	guessed

Show details on NVD website

JSON

To clipboard

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              "attackVector": "NETWORK",
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              "baseScore": 7.5,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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    "dateReserved": "2026-10-06T20:07:46.075Z",
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            "source": "cret@cert.org"
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          {
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}

FKIE_CVE-2026-106550

Vulnerability from fkie_nvd - Published: 2026-10-06 21:17 - Updated: 2026-10-07 13:43

Severity

Summary

References

	URL	Tags
	cret@cert.org	https://github.com/mozilla/node-convict

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "Node-convict",
          "vendor": "Mozilla",
          "versions": [
            {
              "status": "affected",
              "version": "6.2.2"
            }
          ]
        }
      ],
      "source": "cret@cert.org"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Mozilla\u0027s Node-convict (version 6.2.2 and later) is vulnerable to a Denial of Service vulnerability caused by incomplete prototype\u2011pollution protections in config.set(). An attacker controlling the configuration key can write arbitrary properties to constructor.\u003ckey\u003e, which walk() resolves to the global Object function. This allows overwriting core JavaScript methods such as Object.assign, leading to persistent process-wide failures and requiring a restart. The issue bypasses existing filters that only block constructor.prototype.* and __proto__.*. Exploitation requires an endpoint that forwards attacker-controlled keys into config.set()."
    }
  ],
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    }
  ],
  "sourceIdentifier": "cret@cert.org",
  "vulnStatus": "Deferred"
}

GHSA-37Q3-7H5G-P75H

Vulnerability from github – Published: 2026-10-06 21:32 – Updated: 2026-10-06 21:32

Details

Mozilla's Node-convict (version 6.2.2 and later) is vulnerable to a Denial of Service vulnerability caused by incomplete prototype‑pollution protections in config.set(). An attacker controlling the configuration key can write arbitrary properties to constructor., which walk() resolves to the global Object function. This allows overwriting core JavaScript methods such as Object.assign, leading to persistent process-wide failures and requiring a restart. The issue bypasses existing filters that only block constructor.prototype. and proto.. Exploitation requires an endpoint that forwards attacker-controlled keys into config.set().

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-106550"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-06T21:17:18Z",
    "severity": null
  },
  "details": "Mozilla\u0027s Node-convict (version 6.2.2 and later) is vulnerable to a Denial of Service vulnerability caused by incomplete prototype\u2011pollution protections in config.set(). An attacker controlling the configuration key can write arbitrary properties to constructor.\u003ckey\u003e, which walk() resolves to the global Object function. This allows overwriting core JavaScript methods such as Object.assign, leading to persistent process-wide failures and requiring a restart. The issue bypasses existing filters that only block constructor.prototype.* and __proto__.*. Exploitation requires an endpoint that forwards attacker-controlled keys into config.set().",
  "id": "GHSA-37q3-7h5g-p75h",
  "modified": "2026-10-06T21:32:04Z",
  "published": "2026-10-06T21:32:04Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-106550"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mozilla/node-convict"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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.

Action not permitted

CVE-2026-106550 (GCVE-0-2026-106550)

FKIE_CVE-2026-106550

GHSA-37Q3-7H5G-P75H

Tags

Sightings

Nomenclature

Related by attack behaviour