Unleash: CR-approval email renders user-controlled raw HTML (CVE-2026-76909) | HOL Guard CVE

Low · CVSS 2.1CVE-2026-76909GHSA-7HVX-28GP-MF6J

Unleash: CR-approval email renders user-controlled raw HTML

Answer in brief

CVE-2026-76909 records a Low severity (CVSS 2.1) vulnerability in Unleash: CR-approval email renders user-controlled raw HTML. The current sources do not mark it as known exploited. The current feed maps Unleash/unleash (generic), unleash-server (npm). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

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

Published Sep 22, 2026Updated Sep 22, 2026Source checked Sep 22, 2026First seen by HOL Sep 22, 2026Material review Sep 22, 2026

Upstream Advisory

Key facts

Risk: Low · CVSS 2.1
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 2.1. 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 Unleash/unleash (generic), unleash-server (npm). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Unleash/unleashgeneric	<8.0.3	8.0.3
unleash-servernpm	<8.0.3	8.0.3

Recommended response

Check inventory. Check lockfiles and deployed manifests for Unleash/unleash, unleash-server.
Review the reported fix. Update Unleash/unleash to 8.0.3; unleash-server to 8.0.3 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 22, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 22, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 22, 2026

Sources and claim methodology

Upstream source description

Unleash is an open-source feature management platform. Prior to 8.0.3, the change-request approval email template at src/mailtemplates/requested-cr-approval/requested-cr-approval.html.mustache renders the user-controlled changeRequestTitle, requesterName, and requesterEmail values without HTML escaping, and sendRequestedCRApprovalEmail passes those values to Mustache rendering. A project member who can create a change request when approval emails are enabled can inject HTML into an approver's notification, allowing forged links, tracking content, or visually altered email content. This issue is fixed in version 8.0.3.

Quoted source text, attributed separately from HOL analysis.