CVEvulnerability

CVE-2026-35210

7.1 HIGH Published 2026-07-08 Modified 2026-10-25 Official page ↗
Status
Analyzed
Published
2026-07-08
Last modified
2026-10-25
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.1 HIGH — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N
Weaknesses
CWE-639, CWE-863

Description

OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables. Prior to 7.260326.0, an authorization bypass vulnerability in OpenCTI allows any authenticated user with KNOWLEDGE_KNUPDATE permission to bypass Confidence Level validation and Object Marking restrictions by injecting the synchronized-upsert: true HTTP header, enabling attackers to downgrade confidence levels, remove security markings such as TLP:RED, manipulate relationships, and affect STIX object types including Indicators, ThreatActors, Malware, and Reports. This issue is fixed in version 7.260326.0.

Affected configurations

• citeum opencti (< 7.260326.0)

Related

Weakness · CWE (2)

  • CWE-639 Authorization Bypass Through User-Controlled Key weakness
  • CWE-863 Incorrect Authorization weakness

References