Medium 6.5Published Mar 5, 2026

CVE-2026-25962MarkUs: Zip bomb in config upload enables DoS

Updated under an hour ago (Oct 27, 2026, 12:40 AM ET)

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It affects MarkUsProject Markus. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for MarkUsProject Markus

Exploited in the last 30 days

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.

CVSS: 6.5 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-409
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Mar 6, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

MarkUsProject Markus markusproject:markus (from the name)	before 2.9.4	CNA record
markusproject markus markusproject:markus	before 2.9.4	NVD

References

References

https://github.com/MarkUsProject/Markus/security/advisories/GHSA-x8xv-j7fc-65x5	x-refsource-confirm, vendor-advisory
https://github.com/MarkUsProject/Markus/releases/tag/v2.9.4	x-refsource-misc, product, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.