CVE-2026-5321CWE-346CWE-942

vanna-ai vanna FastAPI/Flask Server cross-domain policy

Medium · published April 2, 2026

CVSS v4.0
5.3
EPSS
0%
Percentile
8.1
In the wild
Unconfirmed
What it is

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. The attack can be launched remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

The record
Technical detail
CVSS v4.0
5.3 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
EPSS
0.00189 · 8.1th percentile
Weaknesses
CWE-346 · Origin Validation Error; CWE-942 · Permissive Cross-domain Security Policy with Untrusted Domains
Published
2026-04-02T04:45Z
EPSS history
Timeline
  • 02 APR 04:45Z
    vanna-ai vanna FastAPI/Flask Server cross-domain policy
    cvelistv5