What is CVE-2026-25962?

CVE-2026-25962 is a medium-severity vulnerability in Markusproject Markus, classified under Improper Handling of Highly Compressed Data (Data Amplification). CVSS score: 6.5/10. Published 2026-03-06.

How severe is CVE-2026-25962?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Markusproject Markus

CVE-2026-25962

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 provid…

EPSS: 0.001 (19.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Markusproject Markus — versions < 2.9.4

Weakness classification (CWE)

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

References

https://github.com/MarkUsProject/Markus/security/advisories/GHSA-x8xv-j7fc-65x5 (x_refsource_CONFIRM)
https://github.com/MarkUsProject/Markus/releases/tag/v2.9.4 (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-25962?: CVE-2026-25962 is a medium-severity vulnerability in Markusproject Markus, classified under Improper Handling of Highly Compressed Data (Data Amplification). CVSS score: 6.5/10. Published 2026-03-06.
How severe is CVE-2026-25962?: Medium severity. CVSS v3 base score is 6.5 out of 10.