will-moss Isaiah Websocket Connection Authentication main.go improper authentication (CVE-2026-15542) | HOL Guard CVE

High · CVSS 7.3CVE-2026-15542

will-moss Isaiah Websocket Connection Authentication main.go improper authentication

Answer in brief

CVE-2026-15542 records a High severity (CVSS 7.3) vulnerability in will-moss Isaiah Websocket Connection Authentication main.go improper authentication. The current sources do not mark it as known exploited. The current feed maps will-moss/Isaiah (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Jul 13, 2026Updated Jul 15, 2026Source checked Sep 19, 2026First seen by HOL Jul 13, 2026Material review Jul 15, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.3
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 7.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps will-moss/Isaiah (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
will-moss/Isaiahgeneric	1.36.0 \|\| 1.36.1 \|\| 1.36.2 \|\| 1.36.3 \|\| 1.36.4 \|\| 1.36.5 \|\| 1.36.6 \|\| 1.36.7 \|\| 1.36.8 \|\| 1.36.9	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for will-moss/Isaiah.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Jul 13, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Jul 15, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Jul 13, 2026

Sources and claim methodology

Upstream source description

A vulnerability has been found in will-moss Isaiah up to 1.36.9. This affects an unknown function of the file app/main.go of the component Websocket Connection Authentication. The manipulation leads to improper authentication. The attack can be initiated remotely. The pull request to fix this issue awaits acceptance.

Quoted source text, attributed separately from HOL analysis.