CVE-2026-27807

4.9 mediumEPSS 0.3%

Medium (4.9) in markusproject markus. EPSS 0.3% chance of exploitation in the next 30 days.

MarkUs is a web application for the submission and grading of student assignments. Prior to version 2.9.4, MarkUs allows course instructors to upload YAML files to create/update various entities (e.g., assignment settings). These YAML files are parsed with aliases enabled. This issue has been patched in version 2.9.4.

Severity

CVSS 3.1

4.9 medium

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

EPSS: 0.3% chance of exploitation in the next 30 days; higher than 22% of CVEs (scores of 2026-10-31)
CWE: CWE-776
Published: 2026-03-06
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

markusproject:markus

References

https://github.com/MarkUsProject/Markus/releases/tag/v2.9.4
https://github.com/MarkUsProject/Markus/security/advisories/GHSA-m9rx-85mx-q9h6

Check your stack JSON