CVE-2026-25057 CRITICAL

CVE-2026-25057: Zip Slip in MarkUs config upload allowing RCE

Vendor Markusproject
Product Markus
Weakness CWE-23
Published February 9, 2026
Last update February 10, 2026
View on NVD All CVEs

CVSS base score

9.1/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

February 9, 2026 CVE published
February 10, 2026 Record updated