OpenCTI affected by RCE via notifier template
Priority MEDIUM 44CWE-1336Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-1336.
Summary
OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables. Prior to 6.9.5, the safeEjs.ts file does not properly sanitize EJS templates. Users with the Manage customization capability can run arbitrary JavaScript in the context of the OpenCTI platform process during notifier template execution. This vulnerability is fixed in 6.9.5.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01377 72nd percentileScored 2026-11-07
Fix Fixed opencti (OpenCTI-Platform): 6.9.5
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| OpenCTI-Platform | opencti | before 6.9.5 | 6.9.5 | Patch available | CNA |
- opencti VendorOpenCTI-Platform Affected before 6.9.5 Fixed in 6.9.5 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:citeum:opencti:*:*:*:*:*:*:*:* | before 6.9.5 | Vulnerable | OpenCTI-Platform |
- cpe:2.3:a:citeum:opencti:*:*:*:*:*:*:*:* Versions before 6.9.5 Vulnerable ·OpenCTI-Platform
Remediation
- Fix · CNA opencti (OpenCTI-Platform) Fixed in 6.9.5
Timeline
- 2026-10-02 Threatist record created from CVE-2026-39980
References
More OpenCTI-Platform Opencti vulnerabilities
- TI-2024-24682 OpenCTI May Bypass Introspection Restriction CVSS 3.1HIGH 8.2
- TI-2024-30453 OpenCTI's lack of Rate Limit lead to OTP brute forcing CVSS 3.1HIGH 8.1
- TI-2020-19176 OpenCTI 3.3.1 - Directory Traversal CVSS 4.0HIGH 7.1
- TI-2026-22303 OpenCTI privilege escalation and unauthenticated access via default admin account CVSS 3.1CRITICAL 9.8
- TI-2020-19179 OpenCTI 3.3.1 - Cross Site Scripting CVSS 4.0MEDIUM 5.1
- TI-2024-30771 OpenCTI leaks support information due to inadequate access control CVSS 3.1MEDIUM 4.3
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences