CVE-2026-107278 MISP CVE debrief

Who should care

MISP administrators and users responsible for configuring and maintaining MISP instances, as well as threat intelligence teams relying on MISP for data synchronization, should be aware of this vulnerability. They should verify instance configurations, ensure object descriptions are provided, and prioritize updates to version 2.5.48 or later to prevent data loss and maintain data integrity across the threat-intelligence pipeline.

Why it matters

CVE-2026-107278 is a medium-severity vulnerability in MISP's object synchronization logic. When objects without descriptions are synced, they are silently dropped, causing data loss. MISP administrators and threat intelligence teams should verify instance configurations, ensure object descriptions are provided, and prioritize updates to version 2.5.48 or later.

• Data loss in threat-intelligence pipelines due to silently dropped objects and attributes.
• Potential inconsistencies in threat intelligence data across MISP instances.
• Need for verification of object descriptions before syncing to prevent data loss.
• Prioritization of MISP instance updates to version 2.5.48 or later.

Technical summary

A validation flaw in MISP's object synchronization logic causes objects and attributes to be silently dropped when the description field is empty, leading to data-integrity loss in the threat-intelligence pipeline. The flaw is triggered when an object without a description is synced to a peer instance, which rejects the object due to its validation rule. This results in the loss of threat-intelligence data without external exploitability but can be triggered by authorized users creating objects without descriptions.

Defensive priority

Medium

Recommended defensive actions

• Review MISP instance configurations to ensure proper object synchronization.
• Verify that object descriptions are provided before syncing.
• Monitor for objects dropped during synchronization.
• Update MISP instances to version 2.5.48 or later.
• Perform regular audits of MISP instance configurations.
• Implement additional logging and monitoring for object synchronization.
• Conduct training for users on the importance of providing object descriptions.

Evidence notes

The CVE record and source item provide details on a validation flaw in MISP's object synchronization logic, leading to loss of threat-intelligence data when objects without descriptions are synced. The issue arises from a validation rule on the receiving instance that rejects objects with empty description fields, causing silent data loss. MISP administrators should review instance configurations and ensure that object descriptions are provided before syncing to prevent data loss.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.