CVE-2026-35210
CVE-2026-35210 · OpenCTI: Authorization Bypass via `synchronized-upsert` HTTP Header Injection
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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 · EPSS 0.4% · Fix available
- Published
- Updated
Stack: python
Affected products and versions
opencti
- Versions
- < 7.260326.0: Affected
No fix published
pycti PyPI
- Versions
- 1.2.1
- 1.2.11
- 1.2.12
- 1.2.13
- 1.2.14
- 1.2.15
- 1.2.2
- 1.2.4
- 1.2.9
- 2.0.0
- 2.0.1
- 2.0.2
- 2.0.3
- 2.1.10
- 2.1.11
- 2.1.12
- 2.1.13
- 2.1.3
- 2.1.4
- 2.1.5
- 2.1.6
- 2.1.7
- 2.1.8
- 2.1.9
- 3.0.0
- 3.0.1
- 3.0.2
- 3.0.3
- 3.1.0
- 3.1.1
- 3.1.2
- 3.2.0
- 3.2.1
- 3.2.2
- 3.2.3
- 3.2.4
- 3.2.5
- 3.2.6
- 3.2.7
- 3.3.0
- 3.3.1
- 3.3.2
- 3.3.3
- 4.0.0
- 4.0.1
- 4.0.2
- 4.0.3
- 4.0.4
- 4.0.5
- 4.0.6
- 4.0.7
- 4.1.0
- 4.1.1
- 4.1.2
- 4.2.1
- 4.2.2
- 4.2.3
- 4.2.4
- 4.3.0
- 4.3.1
- 4.3.2
- 4.3.3
- 4.3.4
- 4.3.5
- 4.4.0
- 4.4.1
- 4.4.2
- 4.4.3
- 4.5.0
- 4.5.1
- 4.5.2
- 4.5.3
- 4.5.4
- 4.5.5
- 5.0.0
- 5.0.1
- 5.0.2
- 5.0.3
- 5.1.0
- 5.1.1
- 5.1.2
- 5.1.3
- 5.1.4
- 5.10.0
- 5.10.1
- 5.10.2
- 5.10.3
- 5.11.0
- 5.11.1
- 5.11.10
- 5.11.11
- 5.11.12
- 5.11.13
- 5.11.14
- 5.11.2
- 5.11.3
- 5.11.4
- 5.11.5
- 5.11.6
- 5.11.7
- 5.11.8
- 5.11.9
- 5.12.0
- 5.12.1
- 5.12.10
- 5.12.11
- 5.12.12
- 5.12.13
- 5.12.14
- 5.12.15
- 5.12.16
- 5.12.17
- 5.12.18
- 5.12.19
- 5.12.2
- 5.12.20
- 5.12.21
- 5.12.22
- 5.12.23
- 5.12.24
- 5.12.25
- 5.12.26
- 5.12.27
- 5.12.28
- 5.12.29
- 5.12.3
- 5.12.30
- 5.12.31
- 5.12.32
- 5.12.33
- 5.12.4
- 5.12.5
- 5.12.6
- 5.12.7
- 5.12.8
- 5.12.9
- 5.2.0
- 5.2.1
- 5.2.2
- 5.2.3
- 5.2.4
- 5.3.0
- 5.3.1
- 5.3.10
- 5.3.11
- 5.3.12
- 5.3.13
- 5.3.14
- 5.3.15
- 5.3.16
- 5.3.17
- 5.3.2
- 5.3.3
- 5.3.4
- 5.3.5
- 5.3.6
- 5.3.7
- 5.3.8
- 5.3.9
- 5.3.post5310
- 5.3.post5311
- 5.3.post5312
- 5.3.post5314
- 5.3.post5315
- 5.3.post5316
- 5.3.post5317
- 5.3.post5318
- 5.4.0
- 5.4.1
- 5.5.0
- 5.5.1
- 5.5.2
- 5.5.3
- 5.5.4
- 5.5.5
- 5.5.6
- 5.5.post551
- 5.5.post552
- 5.5.post553
- 5.5.post554
- 5.5.post555
- 5.5.post556
- 5.6.0
- 5.6.1
- 5.6.2
- 5.6.post560
- 5.6.post561
- 5.6.post562
- 5.7.0
- 5.7.1
- 5.7.2
- 5.7.3
- 5.7.4
- 5.7.5
- 5.7.6
- 5.7.post570
- 5.7.post571
- 5.7.post572
- 5.7.post573
- 5.7.post574
- 5.7.post575
- 5.7.post576
- 5.8.0
- 5.8.1
- 5.8.2
- 5.8.3
- 5.8.4
- 5.8.5
- 5.8.6
- 5.8.7
- 5.9.0
- 5.9.1
- 5.9.2
- 5.9.3
- 5.9.4
- 5.9.5
- 5.9.6
- 6.0.0
- 6.0.1
- 6.0.10
- 6.0.2
- 6.0.3
- 6.0.4
- 6.0.5
- 6.0.6
- 6.0.7
- 6.0.8
- 6.0.9
- 6.1.0
- 6.1.1
- 6.1.10
- 6.1.11
- 6.1.12
- 6.1.13
- 6.1.2
- 6.1.3
- 6.1.4
- 6.1.5
- 6.1.6
- 6.1.7
- 6.1.8
- 6.1.9
- 6.2.0
- 6.2.1
- 6.2.10
- 6.2.11
- 6.2.12
- 6.2.13
- 6.2.14
- 6.2.15
- 6.2.16
- 6.2.17
- 6.2.18
- 6.2.19
- 6.2.2
- 6.2.3
- 6.2.4
- 6.2.5
- 6.2.6
- 6.2.7
- 6.2.8
- 6.2.9
- 6.3.0
- 6.3.1
- 6.3.10
- 6.3.11
- 6.3.12
- 6.3.13
- 6.3.14
- 6.3.2
- 6.3.3
- 6.3.4
- 6.3.5
- 6.3.6
- 6.3.7
- 6.3.8
- 6.3.9
- 6.4.0
- 6.4.1
- 6.4.10
- 6.4.11
- 6.4.2
- 6.4.3
- 6.4.4
- 6.4.5
- 6.4.6
- 6.4.7
- 6.4.8
- 6.4.9
- 6.5.0
- 6.5.1
- 6.5.10
- 6.5.11
- 6.5.2
- 6.5.3
- 6.5.4
- 6.5.5
- 6.5.6
- 6.5.7
- 6.5.8
- 6.5.9
- 6.6.0
- 6.6.1
- 6.6.10
- 6.6.11
- 6.6.12
- 6.6.13
- 6.6.14
- 6.6.15
- 6.6.16
- 6.6.17
- 6.6.18
- 6.6.2
- 6.6.3
- 6.6.4
- 6.6.5
- 6.6.6
- 6.6.7
- 6.6.8
- 6.6.9
- 6.7.0
- 6.7.1
- 6.7.10
- 6.7.11
- 6.7.12
- 6.7.13
- 6.7.14
- 6.7.15
- 6.7.16
- 6.7.17
- 6.7.18
- 6.7.19
- 6.7.2
- 6.7.20
- 6.7.3
- 6.7.4
- 6.7.5
- 6.7.6
- 6.7.7
- 6.7.8
- 6.7.9
- 6.8.0
- 6.8.1
- 6.8.10
- 6.8.11
- 6.8.12
- 6.8.13
- 6.8.14
- 6.8.15
- 6.8.16
- 6.8.17
- 6.8.2
- 6.8.3
- 6.8.4
- 6.8.5
- 6.8.6
- 6.8.7
- 6.8.8
- 6.8.9
- 6.9.0
- 6.9.1
- 6.9.10
- 6.9.11
- 6.9.12
- 6.9.13
- 6.9.14
- 6.9.15
- 6.9.16
- 6.9.17
- 6.9.18
- 6.9.19
- 6.9.2
- 6.9.20
- 6.9.21
- 6.9.22
- 6.9.23
- 6.9.24
- 6.9.25
- 6.9.26
- 6.9.27
- 6.9.28
- 6.9.29
- 6.9.3
- 6.9.4
- 6.9.5
- 6.9.6
- 6.9.7
- 6.9.8
- 6.9.9
- 7.260224.0
- 7.260227.0
- 7.260305.0
- 7.260306.0
- 7.260306.1
- 7.260309.0
- 7.260309.0.1
- 7.260309.0.2
- 7.260309.0.3
- 7.260309.0.4
- 7.260309.0.5
- 7.260309.0.6
- 7.260317.0
- 7.260318.0
- Affected ranges
- ECOSYSTEM: < 7.260326.0
Update to 7.260326.0
Original sources
- https://github.com/OpenCTI-Platform/opencti/security/advisories/GHSA-36fr-4m54-94mj
- https://github.com/OpenCTI-Platform/opencti/pull/14243
- https://github.com/OpenCTI-Platform/opencti/commit/134531ddf5ecf741006b7f0870b7c36711b96540
- https://github.com/OpenCTI-Platform/opencti/releases/tag/7.260326.0
- https://nvd.nist.gov/vuln/detail/CVE-2026-35210