Is CVE-2026-27807 actively exploited?

CVE-2026-27807 has no public evidence of in-the-wild exploitation as of 2026-03-12.

What is the CVSS score for CVE-2026-27807?

CVE-2026-27807 has a CVSS score of 4.9 (MEDIUM severity). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H.

How do I patch CVE-2026-27807?

Patch guidance is available from markusproject security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2026-27807.

Which products are affected by CVE-2026-27807?

1 product: markusproject markus.

CVE-2026-27807 - remediation guidance & executive summary

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 Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Attack Vector: network
Complexity: low
Privileges: high
User Action: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: high
Weaknesses: CWE-776

Metadata

Primary Vendor: MARKUSPROJECT
Published: 3/6/2026
Last Modified: 3/12/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

markusproject : markus

Remediation Guidance

Executive Summary

Cite this page

CVE-2026-27807. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2026-27807

View on NIST NVD

CVE-2026-27807 vulnerability