CVE-2026-28405
8.0 · HIGHOverview
CVE-2026-28405 is a high-severity vulnerability affecting markusproject markus. It was published on March 5, 2026 and has a CVSS 3.1 base score of 8.0 (HIGH).
This vulnerability has a CVSS 3.1 base score of 8.0, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical Description
MarkUs is a web application for the submission and grading of student assignments. Prior to version 2.9.1, the courses/<:course_id>/assignments/<:assignment_id>/submissions/html_content route reads the contents of a student-submitted file and renders them without sanitization. This issue has been patched in version 2.9.1.
Remediation
Check the references section for vendor advisories and patches from markusproject. Update markus to the latest patched version. 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.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| markusproject | markus | >= 0, < 2.9.1 | Affected |
Frequently Asked Questions
What is CVE-2026-28405?
CVE-2026-28405 is a high-severity vulnerability affecting markusproject markus. It was published on March 5, 2026 and has a CVSS 3.1 base score of 8.0 (HIGH).
How severe is CVE-2026-28405?
This vulnerability has a CVSS 3.1 base score of 8.0, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2026-28405?
Check the references section for vendor advisories and patches from markusproject. Update markus to the latest patched version. 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-2026-28405?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-28405 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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