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CVE-2019-9039

25
FAUCET Score

CVE-2019-9039 is a critical SQL injection vulnerability affecting Couchbase Sync Gateway versions 2.1.2 and earlier. An unauthenticated attacker could exploit this flaw via the public REST API's "_all_docs" endpoint, specifically through the "startkey" and "endkey" parameters. This allows for arbitrary N1QL statement execution, leading to sensitive data extraction, and potentially denial of service through resource exhaustion. While rated 9.8 Critical on CVSS, there is no known active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
2.1.2CPE matchmatch criteria
cpe:2.3:a:couchbase:sync_gateway:2.1.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.74%
Probability of exploitation in next 30 days
EPSS Percentile
84.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0274 is in the 75th percentile among its peer group of 36,833 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

gopatch availablevia ghsa
Product: github.com/couchbase/sync_gatewayFixed in: 2.5.0

Vendor Advisories (1)

goGHSA-g622-r636-qfqhcritical

SQL Injection in Couchbase Sync Gateway

Feb 15, 2022

References

docs.couchbase.com / sync-gateway/2.5/release-notes.html
Release NotesVendor Advisory
research.hisolutions.com / 2019/06/n1ql-injection-in-couchbase-sync-gateway-cve-2019-9039
ExploitThird Party Advisory
couchbase.com / resources/security