CVE-2025-52490: Couchbase Sync Gateway Cleartext Password Exposure Vulnerability
Summary
CVE-2025-52490: An issue was discovered in Couchbase Sync Gateway before 3.2.6. Affects couchbase versions < 3.2.6. Fixed in 3.2.6. How to fix ↓
Also tracked for
The same CVE-2025-52490 is tracked separately for each ecosystem and vendor. Its fix information is the same; the package and affected versions differ.
Check if this vulnerability affects your application
Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.
No signup required · Results in about 60 seconds
Background
Couchbase Sync Gateway is a critical component of the Couchbase ecosystem, enabling synchronization of data between Couchbase Server and mobile devices. It provides features such as data access control, user authentication, and real-time data synchronization. However, prior to version 3.2.6, it was found to have a significant security flaw that could expose sensitive information.
Vulnerability Detail
An issue was discovered in Couchbase Sync Gateway before version 3.2.6, where cleartext passwords were logged in both sgcollect_info_options.log and sync_gateway.log files. This vulnerability poses a serious risk as it allows unauthorized access to sensitive user credentials, potentially leading to data breaches and unauthorized system access. The CVSS score for this vulnerability is 7.3, indicating a high severity level.
How To Fix
Latest published version: 4.6.3 as of 23 Oct 2026
pip install --upgrade "couchbase==4.6.3"Upgrading to it may include breaking changes; the version below is the minimum fixed release for this vulnerability.
If you need the minimum change
3.2.6
This is the first release that contains the fix.
pip install --upgrade "couchbase==3.2.6"Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, it is advisable to restrict access to the log files and ensure that they are not accessible to unauthorized users. Additionally, consider implementing logging configurations that do not log sensitive information.
Conclusion
The Couchbase Sync Gateway vulnerability (CVE-2025-52490) highlights the importance of securing sensitive information in logs. Users are strongly encouraged to update to version 3.2.6 or later to mitigate the risks associated with cleartext password exposure.
See every vulnerability recorded for couchbase →
FAQ
Couchbase Sync Gateway is a server-side component that facilitates data synchronization between Couchbase Server and mobile applications, providing features like data access control and user authentication.
Cleartext passwords are passwords that are stored or transmitted in an unencrypted format, making them easily readable and vulnerable to interception.
You can use Vulert's playground at Vulert Scanner to check if your application is affected by this vulnerability without requiring any signup.
If updating is not possible, ensure that access to log files is restricted and consider implementing logging configurations that do not expose sensitive information.
The CVSS score of this vulnerability is 7.3, indicating a high severity level that requires immediate attention.
Related vulnerabilities
Recent vulnerabilities recorded for couchbase.
