Arbitrary file upload in Docat-Org Docat

CVE-2026-61645

Docat is a tool for hosting versioned static documentation. In the affected implementation, an arbitrary file upload vulnerability in the `Upload API` arises because the API does not validate the `uploaded file path or type`. An attacker can overwrite sensitive configuration files or place malicious files on the Docat web server. Depending on deployment context, uploaded content can enable remote code execution or cross-site scripting intended to steal cookies or redirect users to malicious websites. Version 1.6.0 mitigates filename-based path traversal; remediation of unrestricted file types or deployment-dependent malicious-content effects is not established by the verified patch.

Vulnerability class: Unrestricted File Upload

Published .

CVSS v3 metric

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

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-61645?
CVE-2026-61645 is a critical-severity vulnerability in Docat-Org Docat, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.1/10. Published 2026-10-29.
How severe is CVE-2026-61645?
Critical severity. CVSS v3 base score is 9.1 out of 10.