CVE-2026-27807 — MEDIUM (4.9)

Q: How severe is CVE-2026-27807?

CVE-2026-27807 has been rated MEDIUM with a CVSS base score of 4.9/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2026-27807?

Check the references section above for vendor advisories and patch information. Affected products include: Markusproject Markus.

Vulnerability Description

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.

CVSS Score

4.9

MEDIUM

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Markusproject	Markus	< 2.9.4

Related Weaknesses (CWE)

CWE-776

References

https://github.com/MarkUsProject/Markus/releases/tag/v2.9.4ProductRelease Notes
https://github.com/MarkUsProject/Markus/security/advisories/GHSA-m9rx-85mx-q9h6Vendor Advisory

FAQ

What is CVE-2026-27807?

CVE-2026-27807 is a vulnerability with a CVSS score of 4.9 (MEDIUM). 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....

How severe is CVE-2026-27807?

CVE-2026-27807 has been rated MEDIUM with a CVSS base score of 4.9/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-27807?

Check the references section above for vendor advisories and patch information. Affected products include: Markusproject Markus.