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Vulnerability · Published Jul 13, 2026 · Assigned by VulDB

CVE-2026-15541will-moss Isaiah Master Websocket server.go Server.Handle authorization

High 7.3

In plain English

A high-severity missing authorization in Isaiah from will-moss. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 46% of all known vulnerabilities).

Severity (CVSS 3.1)7.3High
Exploit odds (30 days)0.5%top 54.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

VendorProductVersions
will-moss Isaiah 1.36.01.36.11.36.21.36.31.36.41.36.51.36.61.36.7

Weakness: CWE-862, CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:X/RL:X/RC:R

References