PT-2026-25902 · Opencti · Opencti

Daffyspider + 1 · Published 2026-03-17 · Updated 2026-03-17 · CVE-2026-21886

Positive Technologies (AI Summary)

CVSS v3.1

8.1

High

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Name of the Vulnerable Software and Affected Versions OpenCTI versions prior to 6.9.1

Description OpenCTI is a platform for managing cyber threat intelligence knowledge and observables. A flaw exists in the 'IndividualDeletionDeleteMutation' GraphQL mutation, allowing the deletion of unrelated and sensitive objects, such as analysis reports. This is due to a lack of validation within the API, failing to confirm contextual relationships between the targeted object and the executed mutation.

Recommendations Update to version 6.9.1 or later.

Exploit

Fix

Improper Authorization

Weakness Enumeration

CWE-566

CWE-285

CWE-915

Related Identifiers

CVE-2026-21886

GHSA-MHMX-J75V-2M6X

PYSEC-2026-117

Affected Products

Opencti

References · 7

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/21xxx/CVE-2026-21886.json · Exploit
• https://github.com/OpenCTI-Platform/opencti/security/advisories/GHSA-mhmx-j75v-2m6x · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-21886 · Vendor Advisory
• https://osv.dev/vulnerability/PYSEC-2026-117 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-21886 · Security Note
• https://twitter.com/CVEnew/status/2033994273163825220 · Twitter Post
• https://twitter.com/VulmonFeeds/status/2033958420005401074 · Twitter Post