CVE-2026-25962

MEDIUM6.5

MarkUs: Zip bomb in config upload enables DoS

Published Mar 6, 2026

Modified 2 months ago

Details

MarkUs is a web application for the submission and grading of student assignments. Prior to version 2.9.4, MarkUs currently extracts zip files without any size or entry-count limits. For example, instructors can upload a zip file to provide an assignment configuration; students can upload a zip file for an assignment submission and indicate its contents should be extracted. This issue has been patched in version 2.9.4.

References

WEB

https://github.com/MarkUsProject/Markus/releases/tag/v2.9.4

WEB

https://github.com/MarkUsProject/Markus/security/advisories/GHSA-x8xv-j7fc-65x5

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2026-25962

CVSS Analysis

CVSS v3.1

6.5

Exploitability

Attack Vector