CVE-2026-4931

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.25% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 17.2% of scored records. A rank, not a probability.

NVD base score

8.6 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Analyzed. NVD last modified this record on 2026-10-26.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-04-07 15:22Z6 MO AGO

Last updated

2026-04-08 14:45Z6 MO AGO

Reserved

2026-03-26

Assigning CNA

certcc

Record state

PUBLISHED

Severity

Medium (CVSS 6.8)

CNA CVSS vector

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

Weaknesses

• CWE-681Incorrect Conversion between Numeric TypesBase

Data version

5.2

Document digest

6e03296c0ba4fbf628bed89603e511bbeabb8887df34a5acbc65cea8ab72b69c

• cvefeed.iohttps://cvefeed.io/cwe/detail/cwe-681-incorrect-conversion-between-numeric-types
• scs.owasp.orghttps://scs.owasp.org/SCWE/SCSVS-CODE/SCWE-041/
• marginal.gitbook.iohttps://marginal.gitbook.io/docs
• github.comhttps://github.com/MarginalProtocol
• medium.comhttps://medium.com/@clarkcorrin/cve-2026-4931-how-spearbits-cantina-denied-a-critical-vulnerability-using-verifiably-false-0a27b92ac2db