What is CVE-2026-85684?

CVE-2026-85684 is a critical-severity vulnerability, classified under External Control of File Name or Path. CVSS score: 9.1/10. Published 2026-09-04.

How severe is CVE-2026-85684?

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

CVE-2026-85684

CVE-2026-85684

marker through 2.0.0 contains a path traversal vulnerability in the FastAPI /marker/upload handler that fails to sanitize the file.filename parameter. Unauthenticated attackers can supply filenames containing directory traversal sequences to write arbitrary files to any location or delete existing files on the system.

CVSS v3 metric

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

Weakness classification (CWE)

CWE-73 — External Control of File Name or Path

References

disclosure@vulncheck.com
disclosure@vulncheck.com
disclosure@vulncheck.com
disclosure@vulncheck.com

Frequently asked questions

What is CVE-2026-85684?: CVE-2026-85684 is a critical-severity vulnerability, classified under External Control of File Name or Path. CVSS score: 9.1/10. Published 2026-09-04.
How severe is CVE-2026-85684?: Critical severity. CVSS v3 base score is 9.1 out of 10.