CVE-2026-25057
Zip Slip in MarkUs config upload allowing RCE
- State
- Published
- Severity
- 9.1 Critical
- Published
- Feb 9, 2026
- Updated
- Feb 10, 2026
- Reserved
- Jan 28, 2026
Description
MarkUs is a web application for the submission and grading of student assignments. Prior to 2.9.1, instructors are able to upload a zip file to create an assignment from an exported configuration (courses/<:course_id>/assignments/upload_config_files). The uploaded zip file entry names are used to create paths to write files to disk without checking these paths. This vulnerability is fixed in 2.9.1.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 9.1 Critical | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H | GitHub_M |
Weaknesses
- CWE-23 Relative Path Traversal
Affected Products
| Product | Versions |
|---|---|
MarkusMarkUsProject |
|
References
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