OpenCTI's GraphQL Mutations Allow Deletion of Unrelated Entities

published 2026-03-17 7 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-12578 , GHSA-mhmx-j75v-2m6x , PYSEC-2026-117

cvss: 6.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 15%
public exploits: 0; none known

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.

Patch / fix

fixed in 2

pypi pycti 6.9.1
citeum opencti 6.9.1

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 7 mo ago (2026-03-17)

Exploit prediction

0.24% chance of exploitation in the next 30 days, higher than 15% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD	3.1	8.1	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
OSV	3.1	8.1	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Affected packages

ecosystem	package	affected	fixed in
pypi	pycti	<6.9.1	6.9.1

Affected products

OpenCTI-Platform opencti

Classification

Weakness

CWE-285 Improper Authorization
CWE-566 Authorization Bypass Through User-Controlled SQL Primary Key
CWE-915 Improperly Controlled Modification of Dynamically-Determined Object Attributes

References

github.com /OpenCTI-Platform/opencti/security/advisories/GHSA-mhmx-j75v-2m6x
vendor-advisory, advisory

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.

Summary