What is CVE-2026-13381?

CVE-2026-13381 is a high-severity vulnerability in Vsee Clinic, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 8.1/10. Published 2026-07-20.

How severe is CVE-2026-13381?

High severity. CVSS v3 base score is 8.1 out of 10.

Auth bypass in Vsee Clinic

CVE-2026-13381

VSee Clinic 7.1.26 and API 1.3.0 contain an Insecure Direct Object Reference (IDOR) vulnerability in the /v1.3.0/api/files endpoint. An authenticated attacker can manipulate the 'remark' request parameter to enumerate, retrieve, and delete files belonging to other users on the application server.

Vulnerability class: IDOR (Insecure Direct Object Reference)

Published 2026-07-20 · last modified 2026-08-14.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.004 (29.4th percentile), scored 2026-10-22.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 29.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.002

Affected products

Vsee Clinic — versions 7.1.26, 1.3.0
Vsee Clinic API — versions 1.3.0

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

57dba5dd-1a03-47f6-8b36-e84e47d335d8 (Third Party Advisory, third-party-advisory)
57dba5dd-1a03-47f6-8b36-e84e47d335d8 (Product, product)

Frequently asked questions

What is CVE-2026-13381?: CVE-2026-13381 is a high-severity vulnerability in Vsee Clinic, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 8.1/10. Published 2026-07-20.
How severe is CVE-2026-13381?: High severity. CVSS v3 base score is 8.1 out of 10.