{"id":"EUVD-2026-64042","revision":"8a82fdda5b954b84a4bb45c9be2e1a1e","records":[{"revision":"8a82fdda5b954b84a4bb45c9be2e1a1e","observedAt":"2026-11-03T12:06:01.581+00:00","statement":{"source":"euvd","id":"EUVD-2026-64042","aliases":["CVE-2026-63466","GHSA-w4mq-xh27-6xpx"],"title":"Unleash is an open-source feature management platform. Prior to 8.0.3, FeatureEventFormatterMd.format in src/lib/addons/feature-event-formatter-md.ts assigns Mustache.escape to an identity function before rendering action and path templates…","description":"Unleash is an open-source feature management platform. Prior to 8.0.3, FeatureEventFormatterMd.format in src/lib/addons/feature-event-formatter-md.ts assigns Mustache.escape to an identity function before rendering action and path templates. Because Mustache.escape is process-wide, the assignment disables escaping for subsequent Mustache.render calls in email-service.ts, webhook.ts, datadog.ts, and new-relic.ts. An editor-level user can place Slack or Microsoft Teams link syntax in an unrestricted username, trigger a feature event, and inject an attacker-labeled link into a trusted outbound notification channel, while other Mustache sinks remain unescaped until restart. This issue is fixed in version 8.0.3.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:L/A:N","score":4.1,"severity":null}],"references":["https://github.com/Unleash/unleash/security/advisories/GHSA-w4mq-xh27-6xpx","https://github.com/Unleash/unleash/commit/002012cfdbedd2e9b7db9dc83b9f549f761db22e","https://github.com/Unleash/unleash/releases/tag/v8.0.3"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-64042","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Aug 21, 2026, 6:21:46 PM","dateUpdated":"Aug 21, 2026, 9:43:35 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-64042","identifiers":["EUVD-2026-64042","CVE-2026-63466","GHSA-w4mq-xh27-6xpx"]},"retained":false,"historicalAffected":[]}],"coverage":[]}