CVE-2025-61782 Open Redirect in OpenCTI's SAML Authentication Flow

What is CVE-2025-61782?

CVE-2025-61782 is a medium-severity vulnerability in OpenCTI-Platform opencti, published on 7 Jan 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables. Prior to version 6.8.3, an open redirect vulnerability exists in the OpenCTI platform's SAML authentication endpoint (/auth/saml/callback). By manipulating the RelayState parameter, an attacker can force the server to issue a 302 redirect to any external URL, enabling phishing, credential theft, and arbitrary site redirection. This issue has been patched in version 6.8.3.

Weakness: CWE-601

Which versions are affected by CVE-2025-61782?

1 open source package ship an affected version, including pycti. It affects 1 product.

Products include Citeum Opencti.

How do I fix CVE-2025-61782?

Upgrade pycti to 6.8.3 or later.

Is CVE-2025-61782 being exploited?

There is no known exploitation of CVE-2025-61782 in the wild and no public exploit code.

Other vulnerabilities in OpenCTI-Platform opencti

• CVE-2026-27960 OpenCTI privilege escalation and unauthenticated access via default admin account Critical 9.8
• CVE-2026-39980 OpenCTI affected by RCE via notifier template Critical 9.1
• CVE-2025-24977 OpenCTI has remote code execution and sensitive secrets exposed through web hook Critical 9.1
• CVE-2024-26139 OpenCTI Authenticated Privilege Escalation High 8.3
• CVE-2024-45404 OpenCTI's lack of Rate Limit lead to OTP brute forcing High 8.1

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-jc3f-c62g-v7qw, PYSEC-2026-2264.