CVE-2026-75159 MongoDB BI Connector Improper Memory Handling During Failed Kerberos Authentication May Cause Process Termination
An unauthenticated attacker can crash the MongoDB BI Connector process by triggering a specific Kerberos authentication error, causing service disruption.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-75159?
CVE-2026-75159 is a high-severity denial of service vulnerability in MongoDB BI Connector, published on 27 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An unauthenticated client that can reach a MongoDB Connector for BI deployment configured with Kerberos authentication may cause mongosqld to terminate when a crafted authentication exchange encounters a specific GSSAPI error-handling condition. This can interrupt BI Connector availability until the process restarts.
Weakness: CWE-415
Which versions are affected by CVE-2026-75159?
It affects 1 product.
Products include Mongodb Bi Connector.
How do I fix CVE-2026-75159?
No fix has been published for CVE-2026-75159 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-75159 being exploited?
There is no known exploitation of CVE-2026-75159 in the wild and no public exploit code.
Other vulnerabilities in MongoDB BI Connector
- CVE-2026-81517 MongoDB Connector for BI Improper Error Handling of Log Write Failures May Cause Loss of SQL Service
- CVE-2026-81518 BI Connector Optional Client Certificate Verification Allows Unauthenticated Connections
- CVE-2026-81520 MongoDB Connector for BI Unbounded Authentication Negotiation Leading to Connection Exhaustion
- CVE-2026-77586 MongoDB Connector for BI Unescaped Object Names in Generated SHOW CREATE Output
- CVE-2026-81490 MongoDB Connector for BI Improper Error Handling During Schema Sampling May Cause Loss of SQL Service
Sources
Also known as GHSA-wwh3-vv7v-5w28.