Home/CVE/Smart contract Marginal v1 performs unsafe downcast, allowing attackers to settle a large debt position for a negligible
CVE

CVE-2026-4931

Smart contract Marginal v1 performs unsafe downcast, allowing attackers to settle a large debt position for a negligible

Smart contract Marginal v1 performs unsafe downcast, allowing attackers to settle a large debt position for a negligible asset cost.

HIGH · CVSS 8.6 EPSS 0.00048
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-681Incorrect Conversion between Numeric Types
▣

Scoring & Timeline

8.6
HIGH · CVSS v3.1 · cret@cert.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD07 Apr 2026 · 04:16 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
SSVC triage · cisa-vulnrichment
Exploitation
poc
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
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References & Sources

5
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://cvefeed.io/cwe/detail/cwe-681-incorrect-conversion-between-numeric-types
https://github.com/MarginalProtocol
https://marginal.gitbook.io/docs
https://medium.com/@clarkcorrin/cve-2026-4931-how-spearbits-cantina-denied-a-critical-vulnerability-using-verifiably-false-0a27b92ac2db
https://scs.owasp.org/SCWE/SCSVS-CODE/SCWE-041/
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