CVE-2026-91825

Affected versions of MISP fail to authorize a submitted sharing group in a specific event-edit path. The vulnerable logic checked whether the acting user could use a sharing_group_id only when the request explicitly supplied distribution = 4. If the attacker instead omitted distribution but supplied a different sharing_group_id, that authorization branch was skipped. Later, MISP’s field-recovery logic restored the existing event distribution from storage. For events already configured with sharing-group distribution, the unauthorized sharing-group ID could therefore be saved. The fix adds authorization checks in both the controller and Event::_edit() whenever a non-empty sharing_group_id is supplied without distribution. The model now calls SharingGroup::checkIfAuthorised() before persisting the change. Version affected: ≤2.5.45

CVSS

No CVSS.

References

Link	Resource
https://github.com/MISP/MISP/commit/cf3ee4026

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-15 09:16

Updated : 2026-09-16 13:42

NVD link : CVE-2026-91825

Mitre link : CVE-2026-91825

CVE.ORG link : CVE-2026-91825

JSON object : View

Products Affected

No product.

CWE

CWE-862

Missing Authorization

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