CVE-2026-27807
Medium
Description
MarkUs is a web application for the submission and grading of student assignments. Prior to version 2.9.4, MarkUs allows course instructors to upload YAML files to create/update various entities (e.g., assignment settings). These YAML files are parsed with aliases enabled. This issue has been patched in version 2.9.4.
SeverityMedium
CVSS4.9
Exploit probability—
ProductMarkus
PublishedMar 6, 2026
First seenMar 6, 2026
Weakness typeCWE-776CWE-776
How to fix
Update
- markusproject markus2.9.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| markusproject markus | v < 2.9.4 | 2.9.4 |
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