High severity · published Apr 7, 2026
CVE-2026-4931
No description published yet
8.6
CVSS
0.3%
EPSS
No
On KEV
Description
Smart contract Marginal v1 performs unsafe downcast, allowing attackers to settle a large debt position for a negligible asset cost.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 17% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MS
Marginal Smart Contract · Marginal
1 · source: vendor
V1
V1-core · Marginal
through 1.0.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-4931
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-4931
Not Applicable
https://cvefeed.io/cwe/detail/cwe-681-incorrect-conversion-between-numeric-types
Product
https://github.com/MarginalProtocol
Product
https://marginal.gitbook.io/docs
Mitigation
https://medium.com/@clarkcorrin/cve-2026-4931-how-spearbits-cantina-denied-a-critical-vulnerability-using-verifiably-false-0a27b92ac2db
Not Applicable
https://scs.owasp.org/SCWE/SCSVS-CODE/SCWE-041/