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Critical Pre-Auth MongoDB Flaw (CVE-2026-118383) Can Crash Lagging Servers on Failover

The Hacker News
CVEVulnerabilityCriticalMongoDB

Overview

A serious vulnerability has been discovered in MongoDB Server, identified as CVE-2026-118383. This flaw allows attackers to send two specific requests that can cause the database server to crash. The issue arises particularly when a server, which is lagging behind in updates, is promoted to the main server role. MongoDB has responded quickly, releasing fixed versions to address this vulnerability. It's crucial for users of MongoDB to apply these updates to prevent potential disruptions in their database operations, especially in environments that rely on server failover for continuity.

Key Takeaways

  • Affected Systems: MongoDB Server, specifically versions affected by CVE-2026-118383.
  • Action Required: MongoDB has released fixed versions earlier this week.
  • Timeline: Newly disclosed

Original Article Summary

A critical flaw in MongoDB Server allows an unauthenticated attacker to send two requests that trigger a crash on the database server. The crash occurs only if that server is later chosen to take over as the main server while it still lacks some recent changes. MongoDB, the company that makes the database, released fixed versions earlier this week. The affected servers are members of a replica

Impact

MongoDB Server, specifically versions affected by CVE-2026-118383.

Exploitation Status

No active exploitation has been reported at this time. However, organizations should still apply patches promptly as proof-of-concept code may exist.

Timeline

Newly disclosed

Remediation

MongoDB has released fixed versions earlier this week. Users should update to the latest versions to mitigate this vulnerability.

Additional Information

This threat intelligence is aggregated from trusted cybersecurity sources. For the most up-to-date information, technical details, and official vendor guidance, please refer to the original article linked below.

Related Topics: This incident relates to CVE, Vulnerability, Critical, and 1 more.

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