What is the CVSS score of CVE-2026-25962?

CVE-2026-25962 has a CVSS 3.1 base score of 6.5 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.0%.

Which versions of Markus are affected by CVE-2026-25962?

Organizations using MarkUs should be aware of notable risk from CVE-2026-25962 rated CVSS 6.5. Exploitation could compromise the security of affected deployments.

How to fix or mitigate CVE-2026-25962?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Markus CVE-2026-25962

MEDIUM

Improper Handling of Highly Compressed Data (Data Amplification) (CWE-409)

2026-03-06 security-advisories@github.com

Information Disclosure Markus

6.5

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

6.5 MEDIUM

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

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 22:06 vuln.today

CVE Published

Mar 06, 2026 - 04:16 nvd

MEDIUM 6.5

DescriptionGitHub Advisory

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.

AnalysisAI

Unrestricted zip file extraction in MarkUs prior to version 2.9.4 allows authenticated users to trigger denial of service through resource exhaustion by uploading specially crafted archives with excessive file counts or sizes. Instructors and students can exploit this during assignment configuration uploads or submission handling to consume server resources and impact system availability. No patch is currently available for affected installations.

Technical ContextAI

Affects Markus. 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.