CVE-2026-4931
CVE-2026-4931
Description
Smart contract Marginal v1 performs unsafe downcast, allowing attackers to settle a large debt position for a negligible asset cost.
INFO
Published Date :
April 7, 2026, 4:16 p.m.
Last Modified :
May 22, 2026, 6:51 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | ||||
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Implement safe casting for all numeric operations.
- Validate debt values before settlement.
- Review contract for similar type vulnerabilities.
Public PoC/Exploit Available at Github
CVE-2026-4931 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-4931.
| URL | Resource |
|---|---|
| https://cvefeed.io/cwe/detail/cwe-681-incorrect-conversion-between-numeric-types | Not Applicable |
| https://github.com/MarginalProtocol | Product |
| https://marginal.gitbook.io/docs | Product |
| https://medium.com/@clarkcorrin/cve-2026-4931-how-spearbits-cantina-denied-a-critical-vulnerability-using-verifiably-false-0a27b92ac2db | Mitigation Press/Media Coverage Third Party Advisory |
| https://scs.owasp.org/SCWE/SCSVS-CODE/SCWE-041/ | Not Applicable |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-4931 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-4931
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
This vulnerability was reported to the Marginal V1 team via Cantina on January 31, 2026. The Cantina triage team (including Mike Leffer) dismissed the report, this is the official validated disclosure
audit bug bugbounty cve defi ethereum ethical-hacking ethreum-blockchain investment-portfolio sec-context- security-audit triage unpaid-labour web3
Solidity
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-4931 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-4931 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
May. 22, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N Added CPE Configuration OR *cpe:2.3:a:marginal:v1-core:*:*:*:*:*:*:*:* versions up to (including) 1.0.2 Added Reference Type CERT/CC: https://cvefeed.io/cwe/detail/cwe-681-incorrect-conversion-between-numeric-types Types: Not Applicable Added Reference Type CERT/CC: https://github.com/MarginalProtocol Types: Product Added Reference Type CERT/CC: https://marginal.gitbook.io/docs Types: Product Added Reference Type CERT/CC: https://medium.com/@clarkcorrin/cve-2026-4931-how-spearbits-cantina-denied-a-critical-vulnerability-using-verifiably-false-0a27b92ac2db Types: Mitigation, Press/Media Coverage, Third Party Advisory Added Reference Type CERT/CC: https://scs.owasp.org/SCWE/SCSVS-CODE/SCWE-041/ Types: Not Applicable -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Apr. 08, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N Added CWE CWE-681 -
New CVE Received by [email protected]
Apr. 07, 2026
Action Type Old Value New Value Added Description Smart contract Marginal v1 performs unsafe downcast, allowing attackers to settle a large debt position for a negligible asset cost. Added Reference https://cvefeed.io/cwe/detail/cwe-681-incorrect-conversion-between-numeric-types Added Reference https://github.com/MarginalProtocol Added Reference https://marginal.gitbook.io/docs Added Reference https://medium.com/@clarkcorrin/cve-2026-4931-how-spearbits-cantina-denied-a-critical-vulnerability-using-verifiably-false-0a27b92ac2db Added Reference https://scs.owasp.org/SCWE/SCSVS-CODE/SCWE-041/