What’s Vulnerable › Vulnerabilities
CVE-2026-82064: Unauthenticated Denial of Service in MongoDB Server via Assertion Failure in Read Concern Processing on Replica Set Members
- Severity: high (CVSS 7.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.5% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-09-08 · updated 2026-09-16
- Weakness: CWE-617
Description
A security issue in MongoDB Server allows an unauthenticated network user to cause a denial of service on a specific type of replica set member. The server contains an assertion in its read concern processing logic that can be reached without authentication, and the assertion's assumptions about internal state do not hold for all member configurations, causing the server process to terminate.
Affected products
- MongoDB: from 7.0.0 before 7.0.41; from 8.0.0 before 8.0.30; from 8.3.0 before 8.3.9 — fixed in 7.0.41, 8.0.30, 8.3.9
How to fix
Upgrade to a fixed version: MongoDB 7.0.41, 8.0.30, 8.3.9. Check the vendor advisory for mitigations.
References
Get alerted when CVE-2026-82064 or the next vulnerability affects your stack