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CVE-2026-63004

CVE-2026-63004 · Unleash: Addon webhook URL is dialed server-side with no internal-address filtering, enabling SSRF to internal services / cloud metadata and exfiltration of configured request headers

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 5.5 · Medium · EPSS 0.4% · Fix available

Published
Updated

Stack: node

Affected products and versions

  • unleash

    Versions
    • < 7.5.2: Affected
    • >= 7.6.0, < 7.6.5: Affected
    • >= 8.0.0, < 8.0.2: Affected

    No fix published

  • unleash-server npm

    Affected ranges
    • SEMVER: < 7.5.2

    Update to 7.5.2

  • unleash-server npm

    Affected ranges
    • SEMVER: ≥ 7.6.0, < 7.6.5

    Update to 7.6.5

  • unleash-server npm

    Affected ranges
    • SEMVER: ≥ 8.0.0, < 8.0.2

    Update to 8.0.2

Original sources

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