CVE-2026-86441 MISP CVE debrief

Who should care

Defenders responsible for MISP deployments and user permission management should assess exposure and verify proper authorization checks. MISP administrators and defenders responsible for user permission management. Relevant roles include MISP administrators and defenders responsible for user permission management. Supported consequences include potential information disclosure and enumeration of organisations. Action priority follows from verifying MISP

Why it matters

Defenders should care about CVE-2026-86441 because it affects MISP dashboard widgets, allowing potential information disclosure and enumeration of organisations. Relevant roles include MISP administrators and defenders responsible for user permission management. Supported consequences include potential information disclosure and enumeration of organisations. Action priority follows from verifying MISP versions and user permissions. Evidence limits include reliance on official CVE and NVD records.

• Authenticated users may be able to enumerate organisations despite intended visibility restrictions
• Potential for information disclosure through organisation database fields

Technical summary

MISP dashboard widgets have inconsistent authorization checks, allowing authenticated users to enumerate organisations even if the normal organisation index is hidden from them. Affected versions of MISP contain inconsistent authorization checks across dashboard widgets that display organisation information. Several organisation-related widgets did not honor Security.hide_organisation_index_from_users. As a result, authenticated users without the perm_sharing_group permission could enumerate organisations even though the normal organisation index was intentionally hidden from them.

Defensive priority

Defenders should prioritize verifying MISP versions and user permissions

Recommended defensive actions

• Verify MISP version and upgrade to a fixed version if necessary
• Review user permissions and ensure proper authorization checks are in place
• Monitor dashboard widget usage and logs for potential abuse
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review. Track exceptions, retest remediated assets, and close the item only after evidence is documented. Plan vendor-supported updates or
• technicalSummary

Evidence notes

The CVE record and NVD entry provide details on the inconsistent authorization checks in MISP dashboard widgets. The CVE record was published on 2026-09-07T13:20:43.287Z and has not been modified since then. Official CVE Program record and Official NIST NVD detail page provide source-provided CVE metadata and source-specific vulnerability assessment.

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.