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High

OpenCTI has Semi-Blind SSRF via Unvalidated External URL in Data Ingestion Feature

  • Disclosed: 12.03.2026
  • Updated: 11.10.2026 12:20

Summary

The OpenCTI platform’s data ingestion feature accepts user-supplied URLs without validation and uses the Axios HTTP client with its default configuration (allowAbsoluteUrls: true). This allows attackers to craft requests to arbitrary endpoints, including internal services, because Axios will accept and process absolute URLs.

This results in a semi-blind SSRF, as responses may not be fully visible but can still impact internal systems.

Impact

OpenCTI’s data ingestion feature can allow an attacker to make the application send HTTP requests to arbitrary internal or external endpoints. This means an attacker could reach internal services that are not exposed publicly, such as Elasticsearch, Redis, or RabbitMQ, and potentially extract sensitive data or manipulate internal components. In cloud environments, the attacker could target metadata services like AWS, Azure, or GCP to obtain credentials and configuration details, which could lead to full compromise of the infrastructure. Even though the SSRF is semi-blind and the attacker may not see the full response, the ability to interact with internal services can enable enumeration, data exfiltration, and in some cases remote code execution if internal APIs expose dangerous functionality.

Affected software

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PlatformPackageVulnerable versionsFixed in
Python (PyPI) pycti < 6.8.16 6.8.16

References

CVSS score 7.7/10
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Weakness (CWE)
CWE-20, CWE-918
Platform
Python (PyPI)
Package
pycti
Disclosed
12.03.2026
Updated
11.10.2026 12:20

Sources and licenses

OSV / GitHub Advisory Database - PYSEC-2026-118 - PyPA Advisory Database; CC BY 4.0

OSV / GitHub Advisory Database - GHSA-ffm6-vvph-g5f5 - CC BY 4.0

Vulnerability history: pycti

All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.

All (22) in the archive
Total entries
22
First → latest
07.2022 07.2026
Without a fix
2
Exploited in attacks
0

Severity breakdown

  • Critical 3
  • High 9
  • Medium 10

Disclosures per year

Severity:
  1. 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
    High · 7.1 CVE-2026-35210 < 7.260326.0 7.260326.0
  2. OpenCTI: Privilege escalation via graphQL API is abusable by organization admins, due to incorrect ACL on userEdit relationAdd
    High · 7.2 CVE-2026-44730 < 6.9.7 6.9.7
  3. OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables. In versions 6.6.0 through 6.9.12, there is a privilege escalation vulnerability that can be exploit
    Critical · 9.8 CVE-2026-27960 >= 6.9.0, < 6.9.13 6.9.13
  4. 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
    High · 7.2 CVE-2026-39980 < 6.9.5 6.9.5
  5. OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables. Prior to version 6.9.1, the GraphQL mutations "IndividualDeletionDeleteMutation" is intended to all
    High · 8.1 CVE-2026-21886 < 6.9.1 6.9.1
  6. OpenCTI has Semi-Blind SSRF via Unvalidated External URL in Data Ingestion Feature this entry
    High · 7.7 CVE-2026-21887 < 6.8.16 6.8.16
  7. OpenCTI 3.3.1 is vulnerable to a directory traversal attack via the static/css endpoint. An unauthenticated attacker can read arbitrary files from the filesystem by sending crafted GET requests with p
    High · 7.5 CVE-2020-37041 <= 3.3.1 no fix
  8. OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables. Prior to version 6.8.1, the GraphQL mutation "WorkspacePopoverDeletionMutation" allows users to del
    Critical · 9.1 CVE-2025-61781 < 6.8.1 6.8.1
  9. OpenCTI is an open cyber threat intelligence (CTI) platform. Prior to version 6.4.11 any user with the capability `manage customizations` can execute commands on the underlying infrastructure where Op
    Critical · 9.1 CVE-2025-24977 >= 6.4.8, < 6.4.11 6.4.11
  10. OpenCTI is an open-source cyber threat intelligence platform. In versions below 6.2.18, because the function to limit the rate of OTP does not exist, an attacker with valid credentials or a malicious
    High · 8.1 CVE-2024-45404 < 6.2.18 6.2.18
  11. OpenCTI is an open source platform allowing organizations to manage their cyber threat intelligence knowledge and observables. Due to lack of certain security controls on the profile edit functionalit
    High · 8.1 CVE-2024-26139 < 5.12.32 5.12.32
  12. In OpenCTI through 5.2.4, a broken access control vulnerability has been identified in the profile endpoint. An attacker can abuse the identified vulnerability in order to arbitrarily change their reg
    High · 7.5 CVE-2022-30290 < 5.3.0 5.3.0

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