What is CVE-2026-25057?

CVE-2026-25057 is a critical-severity vulnerability in Markusproject Markus, classified under Relative Path Traversal. CVSS score: 9.1/10. Published 2026-02-09.

How severe is CVE-2026-25057?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Path Traversal in Markusproject Markus

CVE-2026-25057

MarkUs is a web application for the submission and grading of student assignments. Prior to 2.9.1, instructors are able to upload a zip file to create an assignment from an exported configuration (courses/<:course_id>/assignments/upload_config_files). The uploaded zip file entry names are used to create paths to write files to disk without checking these paths. This vulnerability is fixed in 2.9.1.

EPSS: 0.005 (38.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H.

Affected products

Markusproject Markus — versions < 2.9.1

Weakness classification (CWE)

CWE-23 — Relative Path Traversal

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
security-advisories@github.com (Patch, x_refsource_MISC)
security-advisories@github.com (Product, x_refsource_MISC, Release Notes)

Frequently asked questions

What is CVE-2026-25057?: CVE-2026-25057 is a critical-severity vulnerability in Markusproject Markus, classified under Relative Path Traversal. CVSS score: 9.1/10. Published 2026-02-09.
How severe is CVE-2026-25057?: Critical severity. CVSS v3 base score is 9.1 out of 10.