Is CVE-2019-9039 actively exploited?

No active exploitation of CVE-2019-9039 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2019-9039 be exploited remotely?

Yes. CVE-2019-9039 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2019-9039?

CVE-2019-9039 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2019-9039

CWE-89Published: June 26, 2019· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

In Couchbase Sync Gateway 2.1.2, an attacker with access to the Sync Gateway’s public REST API was able to issue additional N1QL statements and extract sensitive data or call arbitrary N1QL functions through the parameters "startkey" and "endkey" on the "_all_docs" endpoint. By issuing nested queries with CPU-intensive operations they may have been able to cause increased resource usage and denial of service conditions. The _all_docs endpoint is not required for Couchbase Mobile replication and external access to this REST endpoint has been blocked to mitigate this issue. This issue has been fixed in versions 2.5.0 and 2.1.3.

NVD Source

Technical Analysis

CVE-2019-9039 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), availability disruption (denial of service), with a CVSS base score of 9.8.

From a weakness classification perspective (CWE-89): SQL injection vulnerabilities allow attackers to manipulate database queries, potentially exposing or modifying sensitive data.