CVE-2026-24900

Name: CVE-2026-24900
Creator: NVD / NIST
Published: 2026-02-09T20:15:56.387+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.25%

Last modified Jun 17, 2026

CVE-2026-24900 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. MarkUs is a web application for the submission and grading of student assignments. Prior to 2.9.1, the courses/<:course_id>/assignments/<:assignment_id>/submissions/html_content accepted a select_file_id parameter to serve SubmissionFile objects containing a record of files submitted by students. EPSS estimates a 0.25% chance of exploitation in the next 30 days.

Description

MarkUs is a web application for the submission and grading of student assignments. Prior to 2.9.1, the courses/<:course_id>/assignments/<:assignment_id>/submissions/html_content accepted a select_file_id parameter to serve SubmissionFile objects containing a record of files submitted by students. This parameter was not correctly scoped to the requesting user, allowing users access arbitrary submission file contents by id. This vulnerability is fixed in 2.9.1.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

0.25%

16.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-639

Affected Software

Vendor	Product	Versions
Markusproject	Markus	< 2.9.1

References

https://github.com/MarkUsProject/Markus/commit/7daed9fd2d44932223798d997b55094a3bff104bPatch
https://github.com/MarkUsProject/Markus/releases/tag/v2.9.1Product, Release Notes
https://github.com/MarkUsProject/Markus/security/advisories/GHSA-56gh-8hmq-7q88Vendor Advisory

Timeline

Published: Feb 9, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-24900?

How severe is CVE-2026-24900?

CVE-2026-24900 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.25% probability of exploitation in the next 30 days.

How do I fix CVE-2026-24900?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-24900?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST