{"cve":"CVE-2026-63004","nvd":{"published":"2026-08-21T19:17:30.550","modified":"2026-10-14T19:10:00.297","status":"Deferred","description":"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_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N","score":5.5},"cwes":["CWE-918"],"references":["https://github.com/Unleash/unleash/commit/2100db76af3473f13e6fb40096cf17a9c2b741a1","https://github.com/Unleash/unleash/commit/d45f99df924c0d24747b3e45e46fcda7dcd3c1c1","https://github.com/Unleash/unleash/commit/d862562a5ab8f2d1e40f6519c64cf0b4fdaf806d","https://github.com/Unleash/unleash/releases/tag/v7.5.2","https://github.com/Unleash/unleash/releases/tag/v7.6.5"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:49:38.260478770+00:00"},"epss":{"cve":"CVE-2026-63004","score":0.00385,"percentile":0.32311,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-5vf6-jrqr-78fj","url":"https://osv.dev/vulnerability/GHSA-5vf6-jrqr-78fj","summary":"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","modified":"2026-08-21T19:40:58.045840Z","packages":[{"ecosystem":"npm","name":"unleash-server","purl":"pkg:npm/unleash-server","ranges":["<7.5.2"],"fixed":["7.5.2"]},{"ecosystem":"npm","name":"unleash-server","purl":"pkg:npm/unleash-server","ranges":[">=7.6.0 <7.6.5"],"fixed":["7.6.5"]},{"ecosystem":"npm","name":"unleash-server","purl":"pkg:npm/unleash-server","ranges":[">=8.0.0 <8.0.2"],"fixed":["8.0.2"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}