What is CVE-2026-5321?

CVE-2026-5321 is a medium-severity vulnerability in Vanna-ai Vanna, classified under Origin Validation Error. CVSS score: 4.3/10. Published 2026-04-02.

How severe is CVE-2026-5321?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in Vanna-ai Vanna

CVE-2026-5321

A flaw has been found in vanna-ai vanna up to 2.0.2. Affected by this issue is some unknown functionality of the component FastAPI/Flask Server. Executing a manipulation can lead to permissive cross-domain policy with untrusted domains. Th…

EPSS: 0.002 (5.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.

Affected products

Vanna-ai Vanna — versions 2.0.0, 2.0.1, 2.0.2

Weakness classification (CWE)

References

cna@vuldb.com (vdb-entry)
cna@vuldb.com (signature, permissions-required)
cna@vuldb.com (third-party-advisory)
cna@vuldb.com (issue-tracking, exploit)

Frequently asked questions

What is CVE-2026-5321?: CVE-2026-5321 is a medium-severity vulnerability in Vanna-ai Vanna, classified under Origin Validation Error. CVSS score: 4.3/10. Published 2026-04-02.
How severe is CVE-2026-5321?: Medium severity. CVSS v3 base score is 4.3 out of 10.