CVE-2026-25611 Pre-Authentication Memory Exhaustion Denial of Service in MongoDB Server
Unauthenticated attackers can crash MongoDB servers by sending crafted messages that exhaust memory resources.
- 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-2026-25611?
CVE-2026-25611 is a high-severity denial of service vulnerability in MongoDB Server, published on 10 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A series of specifically crafted, unauthenticated messages can exhaust available memory and crash a MongoDB server.
Weakness: CWE-405
Which versions are affected by CVE-2026-25611?
How do I fix CVE-2026-25611?
No fix has been published for CVE-2026-25611 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-2026-25611 being exploited?
There is no known exploitation of CVE-2026-25611 in the wild and no public exploit code.
Sources
Also known as GHSA-x39r-jq9q-xvvh, UBUNTU-CVE-2026-25611.