CVE-2026-15541

HIGH

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

Title source: cna
STIX 2.1

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.

References (7)

Core 7
Core References
Vdb Entry, Technical Description vdb-entry technical-description
VDB-377891 | will-moss Isaiah Master Websocket server.go Server.Handle authorization
https://vuldb.com/vuln/377891
Signature, Permissions Required signature permissions-required
VDB-377891 | CTI Indicators (IOB, IOC, IOA)
https://vuldb.com/vuln/377891/cti
Third Party Advisory third-party-advisory
CVE-2026-15541 | CVE Analysis and Report
https://vuldb.com/cve/CVE-2026-15541
Third Party Advisory third-party-advisory
Submit #855074 | will-moss Isaiah 1.36.9 CWE-862 Missing Authorization
https://vuldb.com/submit/855074
Issue Tracking issue-tracking
https://github.com/will-moss/isaiah/issues/34
Patch issue-tracking patch
https://github.com/will-moss/isaiah/pull/35

Scores

CVSS v3 7.3
EPSS 0.0032
EPSS Percentile 24.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-862 CWE-863
Status published
Products (10)
will-moss/Isaiah 1.36.0
will-moss/Isaiah 1.36.1
will-moss/Isaiah 1.36.2
will-moss/Isaiah 1.36.3
will-moss/Isaiah 1.36.4
will-moss/Isaiah 1.36.5
will-moss/Isaiah 1.36.6
will-moss/Isaiah 1.36.7
will-moss/Isaiah 1.36.8
will-moss/Isaiah 1.36.9
Published Jul 13, 2026
Tracked Since Jul 13, 2026