CVE Catalog

CVE-2026-15541

HighCVSS 7.3
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.32%

24th percentile - higher than 24% of all known CVEs

Summary

A missing authorization vulnerability was found in will-moss Isaiah up to version 1.36.9 in the Server.Handle function of app/server/server/server.go within the Master Websocket Handler component. Manipulation of the Agent argument allows remote exploitation without proper authorization.

Risk Assessment

An attacker can remotely gain unauthorized access to WebSocket functions, potentially leading to data confidentiality and integrity breaches and server takeover.

Recommendation

Immediately update will-moss Isaiah to the latest available version after the fix pull request is accepted, or apply temporary WAF rules blocking manipulation of the Agent argument.

Related vulnerabilities

Original NVD description (English source)

A flaw has been found in will-moss Isaiah up to 1.36.9. The impacted element is the function Server.Handle of the file app/server/server/server.go of the component Master Websocket Handler. Executing a manipulation of the argument Agent can lead to missing authorization. It is possible to launch the attack remotely. The pull request to fix this issue awaits acceptance.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS