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: 0.000 (0.4th 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
- VDB-354653 | vanna-ai vanna FastAPI/Flask Server cross-domain policy (vdb-entry)
- VDB-354653 | CTI Indicators (IOB, IOC) (signature, permissions-required)
- Submit #780729 | vanna-ai vanna 2.0.2 CORS Origin Reflection with Credentials (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.