CVE-2026-27807
Last modified
CVE-2026-27807 is a medium-severity vulnerability rated 4.9/10 on the CVSS scale. 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). EPSS estimates a 0.28% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Markusproject | Markus | < 2.9.4 |
References
- https://github.com/MarkUsProject/Markus/releases/tag/v2.9.4Product, Release Notes
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-27807?
How severe is CVE-2026-27807?
How do I fix CVE-2026-27807?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-27800Zed, a code editor, has a Zip Slip (Path Traversal) vulnerab…7.4
- CVE-2026-27801Vaultwarden is an unofficial Bitwarden compatible server wri…5.9
- CVE-2026-27802Vaultwarden is an unofficial Bitwarden compatible server wri…8.3
- CVE-2026-27803Vaultwarden is an unofficial Bitwarden compatible server wri…8.3
- CVE-2026-27804Parse Server is an open source backend that can be deployed …9.1
- CVE-2026-27806Fleet is open source device management software. Prior to 4.…7.8
- CVE-2026-27808Mailpit is an email testing tool and API for developers. Pri…8.6
- CVE-2026-27809psd-tools is a Python package for working with Adobe Photosh…9.1
- CVE-2026-2781Integer overflow in the Libraries component in NSS. This vul…9.8
- CVE-2026-27810calibre is a cross-platform e-book manager for viewing, conv…6.4
- CVE-2026-27811Roxy-WI is a web interface for managing Haproxy, Nginx, Apac…8.8
- CVE-2026-27812Sub2API is an AI API gateway platform designed to distribute…9.1
Are you affected by CVE-2026-27807?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST