What’s Vulnerable › Vulnerabilities

CVE-2026-25611: Pre-Authentication Memory Exhaustion Denial of Service in MongoDB Server

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-02-10 · updated 2026-06-17
• Weakness: CWE-405

Description

A series of specifically crafted, unauthenticated messages can exhaust available memory and crash a MongoDB server.

Affected products

• MongoDB: from 8.2 before 8.2.4; from 8.0 before 8.0.18; from 7.0 before 7.0.29 — fixed in 7.0.29, 8.0.18, 8.2.4

How to fix

Upgrade to a fixed version: MongoDB 7.0.29, 8.0.18, 8.2.4. Check the vendor advisory for mitigations.

References

• https://jira.mongodb.org/browse/SERVER-116206
• https://jira.mongodb.org/browse/SERVER-116210
• https://jira.mongodb.org/browse/SERVER-116211

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