{"id":"EM-20261105-CH5Y","url":"https://cyber.eventmonitor.net/incident/EM-20261105-CH5Y/critical-vulnerability-cve-2026-54378/","type":"cve","title":"Critical Vulnerability (CVE-2026-54378)","subtitle":"CVE-2026-54378","subject":"CVE-2026-54378","status":"Developing","severity":"critical","affected":[],"headline":null,"born":"2026-11-05T00:33:06.000Z","firstSignal":"2026-11-04T22:18:05.777Z","lastSignal":"2026-11-05T00:33:06.000Z","updated":"2026-11-05T02:06:24.577Z","revision":1,"life":[{"status":"Born","at":"2026-11-05T00:33:06.000Z","why":"second independent source: C29 CIRCL Vulnerability-Lookup"},{"status":"Developing","at":"2026-11-05T00:33:06.000Z","why":"signals keep joining"}],"changeLog":[{"at":"2026-11-04T22:18:05.777Z","what":"First signal: C6 NVD CVE API 2.0"},{"at":"2026-11-05T00:33:06.000Z","what":"Born: second source, C29 CIRCL Vulnerability-Lookup. Page EM-20261105-CH5Y created."}],"stages":[{"name":"Disclosed","at":"2026-11-04T22:18:05.777Z","detail":"C6 NVD published"},{"name":"Scored","at":"2026-11-04T22:18:05.777Z","detail":"CVSS 9.3"},{"name":"Exploited","at":null,"detail":"No exploitation reported"},{"name":"Advisories","at":null,"detail":"None yet"},{"name":"Vendor Response","at":null,"detail":"None in sources yet"},{"name":"Resolved","at":null,"detail":"After 14 quiet days"}],"signals":[{"at":"2026-11-04T22:18:05.777Z","source":"C6","sourceName":"NVD CVE API 2.0","role":"Database","severity":4,"title":"CVE-2026-54378 (CVSS 9.3)","text":"VitaFit cloud API before 2026-10-30 contained a broken access control vulnerability that allows any authenticated user to obtain temporary AWS credentials by calling the POST /front/user/s3/token/ endpoint. Attackers can use these improperly scoped credentials to list the shared storage bucket and read or overwrite other users' stored files, enabling unauthorized cross-user data access and manipulation.","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54378"},{"at":"2026-11-05T00:33:06.000Z","source":"C29","sourceName":"CIRCL Vulnerability-Lookup","role":"Database","severity":2,"title":"GHSA-jr4h-546g-564w / CVE-2026-54378","text":"VitaFit cloud API before 2026-10-30 contained a broken access control vulnerability that allows any authenticated user to obtain temporary AWS credentials by calling the POST /front/user/s3/token/ endpoint. Attackers can use these improperly scoped credentials to list the shared storage bucket and r","url":"https://vulnerability.circl.lu/vuln/GHSA-jr4h-546g-564w"}],"crowd":[],"reference":{"nvd":{"published":"2026-11-04T22:18:05.777","score":9.3,"severity":"CRITICAL","desc":"VitaFit cloud API before 2026-10-30 contained a broken access control vulnerability that allows any authenticated user to obtain temporary AWS credentials by calling the POST /front/user/s3/token/ endpoint. Attackers can use these improperly scoped credentials to list the shared storage bucket and r","product":"","seen":1793840810406},"kev":null,"epss":null,"p0":false},"mergedInto":null,"publisher":"Event Monitor Cyber"}