What is CVE-2026-55502?

CVE-2026-55502 is a high-severity vulnerability in Cloudreve, classified under Incorrect Authorization. CVSS score: 7.1/10. Published 2026-07-31.

How severe is CVE-2026-55502?

High severity. CVSS v3 base score is 7.1 out of 10.

Auth bypass in Cloudreve

CVE-2026-55502

Cloudreve is a self-hosted file management and sharing system. Prior to 4.17.0, POST /api/v4/admin/policy/oauth/signin requires only Admin.Read even though GetOauthRedirectService persists caller-supplied OneDrive secret and app_id values…

Vulnerability class: Broken Access Control

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L.

Affected products

Cloudreve — versions < 4.17.0

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-55502?: CVE-2026-55502 is a high-severity vulnerability in Cloudreve, classified under Incorrect Authorization. CVSS score: 7.1/10. Published 2026-07-31.
How severe is CVE-2026-55502?: High severity. CVSS v3 base score is 7.1 out of 10.