FKIE_CVE-2026-4931

Vulnerability from fkie_nvd - Published: 2026-04-07 16:16 - Updated: 2026-05-22 18:51
Severity
8.6 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
6.8 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N
Summary
Smart contract Marginal v1 performs unsafe downcast, allowing attackers to settle a large debt position for a negligible asset cost.
References
cret@cert.orghttps://cvefeed.io/cwe/detail/cwe-681-incorrect-conversion-between-numeric-typesNot Applicable
cret@cert.orghttps://github.com/MarginalProtocolProduct
cret@cert.orghttps://marginal.gitbook.io/docsProduct
cret@cert.orghttps://medium.com/@clarkcorrin/cve-2026-4931-how-spearbits-cantina-denied-a-critical-vulnerability-using-verifiably-false-0a27b92ac2dbMitigation, Press/Media Coverage, Third Party Advisory
cret@cert.orghttps://scs.owasp.org/SCWE/SCSVS-CODE/SCWE-041/Not Applicable
Impacted products
Vendor Product Version
marginal v1-core *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:marginal:v1-core:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "B67F41A5-EAF7-4420-ADBF-21E4CB8DC1A0",
              "versionEndIncluding": "1.0.2",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Smart contract Marginal v1 performs unsafe downcast, allowing attackers to settle a large debt position for a negligible asset cost."
    }
  ],
  "id": "CVE-2026-4931",
  "lastModified": "2026-05-22T18:51:04.553",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 8.6,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 4.0,
        "source": "nvd@nist.gov",
        "type": "Primary"
      },
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.8,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 4.0,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-04-07T16:16:30.410",
  "references": [
    {
      "source": "cret@cert.org",
      "tags": [
        "Not Applicable"
      ],
      "url": "https://cvefeed.io/cwe/detail/cwe-681-incorrect-conversion-between-numeric-types"
    },
    {
      "source": "cret@cert.org",
      "tags": [
        "Product"
      ],
      "url": "https://github.com/MarginalProtocol"
    },
    {
      "source": "cret@cert.org",
      "tags": [
        "Product"
      ],
      "url": "https://marginal.gitbook.io/docs"
    },
    {
      "source": "cret@cert.org",
      "tags": [
        "Mitigation",
        "Press/Media Coverage",
        "Third Party Advisory"
      ],
      "url": "https://medium.com/@clarkcorrin/cve-2026-4931-how-spearbits-cantina-denied-a-critical-vulnerability-using-verifiably-false-0a27b92ac2db"
    },
    {
      "source": "cret@cert.org",
      "tags": [
        "Not Applicable"
      ],
      "url": "https://scs.owasp.org/SCWE/SCSVS-CODE/SCWE-041/"
    }
  ],
  "sourceIdentifier": "cret@cert.org",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-681"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}


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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

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.


Detection rules are retrieved from Rulezet.