SecuriTricks - CVE-2026-4931

Description

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

Product(s) Impacted

Vendor	Product	Versions
Marginal	Smart Contract	*

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-681

Incorrect Conversion between Numeric Types

When converting from one data type to another, such as long to integer, data can be omitted or translated in a way that produces unexpected values. If the resulting values are used in a sensitive context, then dangerous behaviors may occur.

*CPE(s)

Affected systems and software identified for this CVE.

Type	Vendor	Product	Version	Update	Edition	Language	Software Edition	Target Software	Target Hardware	Other Information
a	marginal	smart_contract	/	/	/	/	/	/	/	/

References

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/

CVSS Score

6.8 / 10

CVSS Data - 3.1

Attack Vector: NETWORK
Attack Complexity: HIGH
Privileges Required: NONE
Scope: CHANGED
Confidentiality Impact: NONE
Integrity Impact: HIGH
Availability Impact: NONE

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

View Vector String

Timeline

Published: April 7, 2026, 4:16 p.m.
Last Modified: April 8, 2026, 9:27 p.m.

Status : Awaiting Analysis

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

[email protected]

CVE-2026-4931