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CVE-2026-78145

4.3 · MEDIUM

A vulnerability has been found in CTFd up to 3.8.4.

Published Aug 23, 2026CWE-601EPSS 0.56%

Overview

CVE-2026-78145 is a medium-severity vulnerability. It was published on August 23, 2026 and has a CVSS 3.1 base score of 4.3 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 4.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

A vulnerability has been found in CTFd up to 3.8.4. The affected element is the function _is_safe_url of the file CTFd/utils/validators/__init__.py. Such manipulation of the argument Next leads to open redirect. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The name of the patch is 5d8515842fd1ab2c3a9f2dde9ffca907aa334ea9. Upgrading the affected component is recommended.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/CTFd/CTFd/GitHubgithub.com/CTFd/CTFd/commit/5d8515842fd1ab2c3a9f2dde9ffca907aa334ea9GitHubgithub.com/CTFd/CTFd/pull/3026GitHubgithub.com/CTFd/CTFd/releases/tag/3.8.4Refmblunt.dev/writeups/ctfd-open-redirect/Refvuldb.com/cve/CVE-2026-78145Refvuldb.com/submit/882469Refvuldb.com/vuln/394533Refvuldb.com/vuln/394533/cti

How CyberStrike helps

Frequently asked questions

What is CVE-2026-78145?

CVE-2026-78145 is a medium-severity vulnerability. It was published on August 23, 2026 and has a CVSS 3.1 base score of 4.3 (MEDIUM).

How severe is CVE-2026-78145?

This vulnerability has a CVSS 3.1 base score of 4.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-78145?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-78145?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-78145 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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