CVE-2026-35210OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables.
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.1 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N
- Weakness (CWE)
- CWE-639, CWE-863
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jul 13, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
citeum opencti citeum:opencti | before 7.260326.0 | NVD |
References
- https://github.com/OpenCTI-Platform/opencti/commit/134531ddf5ecf741006b7f0870b7c36711b96540patch
- https://github.com/OpenCTI-Platform/opencti/pull/14243issue-tracking, patch
- https://github.com/OpenCTI-Platform/opencti/releases/tag/7.260326.0product, release-notes
- https://github.com/OpenCTI-Platform/opencti/security/advisories/GHSA-36fr-4m54-94mjvendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.