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Cross-site Scripting (XSS) Affecting unleash-server package, versions <8.0.3-r0

Severity

 Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.27% (17th percentile)

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  • Snyk IDSNYK-MINIMOSLATEST-UNLEASHSERVER-20068029
  • published24 Sept 2026
  • disclosed22 Sept 2026
Report a new vulnerability Found a mistake?

Introduced: 22 Sep 2026

NewCVE-2026-76909  (opens in a new tab)
CWE-79  (opens in a new tab)

How to fix?

Upgrade Minimos:latest unleash-server to version 8.0.3-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream unleash-server package and not the unleash-server package as distributed by Minimos. See How to fix? for Minimos:latest relevant fixed versions and status.

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.