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CVE-2026-25962: MarkUs is a web application for the submission and grading of student assignments

28
Routine
MEDIUM 6.5UPGRADE

CVE-2026-25962 is a medium-severity flaw (CVSS 6.5) affecting markus. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

  • No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score6.5 (Medium)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededLow
User interactionNone
EPSS exploit chance0.3% (top 81%)
CISA exploited listNo
WeaknessCWE-409
Published2026-03-06
Last modified2026-06-17
Publisher (CNA): GitHub, Inc. · Vendor: markusproject

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Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

markusproject markus UPGRADE
Affected: < 2.9.4
Fixed in: 2.9.4
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy markus || rpm -q markus || markus --version
2. UPGRADE to 2.9.4 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade markus
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade markus
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-25962?

markus: upgrade to 2.9.4. Exact commands for each OS are on this page.

Is CVE-2026-25962 being exploited?

CVE-2026-25962 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-25962 affect?

CVE-2026-25962 affects markus. Severity is medium (CVSS 6.5). 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

How urgent is CVE-2026-25962?

Priority 28/100. No elevated risk signals yet.

Related CVEs

References

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