{"cve":"CVE-2019-11496","nvd":{"published":"2019-09-10T18:15:12.557","modified":"2026-06-17T02:13:01.370","status":"Modified","description":"In versions of Couchbase Server prior to 5.0, the bucket named \"default\" was a special bucket that allowed read and write access without authentication. As part of 5.0, the behavior of all buckets including \"default\" were changed to only allow access by authenticated users with sufficient authorization. However, users were allowed unauthenticated and unauthorized access to the \"default\" bucket if the properties of this bucket were edited. This has been fixed in versions 5.1.0 and 5.5.0.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","score":9.1},"cwes":["CWE-306"],"references":["https://www.couchbase.com/resources/security#SecurityAlerts","https://www.couchbase.com/resources/security#SecurityAlerts"],"products":["couchbase:couchbase_server"],"source":"nvd","synced_at":"2026-10-19T20:58:39.700375520+00:00"},"epss":{"cve":"CVE-2019-11496","score":0.0141,"percentile":0.72658,"date":"2026-10-31"},"kev":null,"osv":[],"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."]}