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Server-Side Request Forgery (SSRF) Affecting unleash-server package, versions <8.0.2-r0

Severity

 Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.28% (21st percentile)

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  • Snyk IDSNYK-MINIMOSLATEST-UNLEASHSERVER-19232323
  • published23 Aug 2026
  • disclosed21 Aug 2026
Report a new vulnerability Found a mistake?

Introduced: 21 Aug 2026

NewCVE-2026-63004  (opens in a new tab)
CWE-918  (opens in a new tab)

How to fix?

Upgrade Minimos:latest unleash-server to version 8.0.2-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 7.5.2, 7.6.5, and 8.0.2, the addon and integration subsystem passes the operator-controlled parameters.url value from src/lib/addons/webhook.ts and the Slack, Microsoft Teams, Datadog, and New Relic integrations to Addon.fetchRetry in src/lib/addons/addon.ts without restricting loopback, link-local, private, or cloud metadata addresses. An authenticated actor with the root CREATE_ADDON or UPDATE_ADDON permission can cause the server to send requests from inside its network boundary, use integration event status as a blind probing oracle, forward Authorization, customHeaders, or DD-API-KEY values to an attacker-observed host, and deliver the feature-event JSON body to internal services. This issue is fixed in versions 7.5.2, 7.6.5, and 8.0.2.