CVE-2026-107755 Apache Software Foundation CVE debrief

Who should care

System administrators and security teams responsible for Apache CouchDB deployments should assess exposure and prioritize upgrading to version 3.5.3. They should review and manage replication credentials to prevent potential unauthorized access. This vulnerability impacts operators responsible for maintaining secure configurations and ensuring the integrity of sensitive data. Security teams should monitor for unauthorized access to replication credentials.

Why it matters

CVE-2026-107755 is a medium-severity vulnerability in Apache CouchDB that allows authenticated users to read replication credentials of other users. System administrators and security teams should assess exposure, prioritize upgrading to version 3.5.3, and manage replication credentials to prevent potential unauthorized access.

• Authenticated users can access replication credentials of other users
• Potential unauthorized access to sensitive data
• Need to verify and manage replication credentials
• Upgrade to version 3.5.3 to fix the issue

Technical summary

Apache CouchDB 3.5.2 and below are vulnerable to credential disclosure via the _replicator database. An authenticated user can read replication credentials of other users' replications. The issue is fixed in version 3.5.3, which improves filtering of credentials in the _replicator database. System administrators should review and manage replication credentials to prevent potential unauthorized access. This vulnerability has a medium severity and requires immediate attention to prevent exploitation. Users should assess exposure and prioritize upgrading to version 3.5.3.

Defensive priority

Medium priority for authentication and replication credential management

Recommended defensive actions

• Upgrade Apache CouchDB to version 3.5.3 or later
• Review and manage replication credentials
• Monitor for unauthorized access to replication credentials
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record and source item provide details on the vulnerability in Apache CouchDB 3.5.2 and below, allowing authenticated users to read replication credentials of other users' replications. The vendor recommends upgrading to version 3.5.3. Evidence is limited to CVE Program and NVD records, which may not cover all affected deployments or configurations. Defenders should verify replication credentials and assess exposure in their environments.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.