CVE-2026-21886

OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables. Prior to version 6.9.1, the GraphQL mutations "IndividualDeletionDeleteMutation" is intended to allow users to delete individual entity objects respectively. However, it was observed that this mutation can be misused to delete unrelated and sensitive objects such as analyses reports etc. This behavior stems from the lack of validation in the API to ensure that the targeted object is contextually related to the mutation being executed. Version 6.9.1 fixes the issue.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/OpenCTI-Platform/opencti/security/advisories/GHSA-mhmx-j75v-2m6x	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:citeum:opencti:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-03-17 16:16

Updated : 2026-03-19 19:33

NVD link : CVE-2026-21886

Mitre link : CVE-2026-21886

CVE.ORG link : CVE-2026-21886

JSON object : View

Products Affected

citeum

opencti

CWE

CWE-285

Improper Authorization

CWE-566

Authorization Bypass Through User-Controlled SQL Primary Key

CWE-915

Improperly Controlled Modification of Dynamically-Determined Object Attributes

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