Is CVE-2019-11496 actively exploited?

No active exploitation of CVE-2019-11496 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2019-11496 be exploited remotely?

Yes. CVE-2019-11496 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2019-11496?

CVE-2019-11496 has a CVSS score of 9.1 (CRITICAL).

HOME VULNERABILITIESCVE-2019-11496

CRITICAL

CVE-2019-11496

CWE-306Published: September 10, 2019· Updated: Jun 17, 2026

9.1

CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2019-11496 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), with a CVSS base score of 9.1.