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OpenAdvisories
Medium · 6.5 CVE-2026-25962 EUVD-2026-9967

MarkUs: Zip bomb in config upload enables DoS

Published Mar 6, 2026 · Updated Mar 6, 2026 · Assigned by GitHub_M

Description

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.

Affected products

VendorProductAffectedFixed
MarkUsProject Markus < 2.9.4 —

References