CVE-2026-9735 Keyfile contents are in MongoDB Server logs
Attackers with log access can read sensitive authentication credentials from MongoDB server logs when connection health metric logging is enabled.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-9735?
CVE-2026-9735 is a medium-severity vulnerability in Mongodb Mongodb, published on 9 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
MongoDB server may log authentication parameters, including credentials, to the server log during SASL authentication. When connection health metric logging is enabled, the full authentication parameters are written to the log without redaction.
Weakness: CWE-532
Which versions are affected by CVE-2026-9735?
1 open source package ship an affected version, including mongodb. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
mongodb Bitnami | From 8.3.0 | 8.3.3 |
Products include Mongodb Mongodb.
How do I fix CVE-2026-9735?
Upgrade mongodb to 8.3.3 or later.
Is CVE-2026-9735 being exploited?
There is no known exploitation of CVE-2026-9735 in the wild and no public exploit code.
Other vulnerabilities in Mongodb Mongodb
- CVE-2025-14847 MongoDB and MongoDB Server Improper Handling of Length Parameter Inconsistency
- CVE-2026-82067 Auth bypass in MongoDB Server
- CVE-2026-13072 MongoDB Improper Input Validation in Compute Mode External Data Processing Leading to Memory Corruption
- CVE-2017-15535 Denial of service in n/a
- CVE-2026-18691 Improper Authentication in MongoDB Intra-Cluster Connections Allows Credential Exposure
Sources
Also known as BIT-mongodb-2026-9735, GHSA-93h4-p6c6-58pw, MINI-9gpq-3fgj-34q8, UBUNTU-CVE-2026-9735.