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CVE-2026-5321— vanna-ai vanna FastAPI/Flask Server cross-domain policy

Quick assessment

Affected
vanna-ai vanna
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Vanna是Vanna公司的一个个性化 AI SQL 代理。 vanna 2.0.2及之前版本存在安全漏洞，该漏洞源于组件FastAPI/Flask Server存在过于宽松的跨域策略，可能导致远程攻击。

CVSS 4.3 · Medium EPSS 0.19% · P8
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I. Basic Information for CVE-2026-5321

Vulnerability Information
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Vulnerability Title
vanna-ai vanna FastAPI/Flask Server cross-domain policy
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
过度许可的跨域白名单
Source: CVE Program / CVE List V5
Vulnerability Title
Vanna 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Vanna是Vanna公司的一个个性化 AI SQL 代理。 vanna 2.0.2及之前版本存在安全漏洞，该漏洞源于组件FastAPI/Flask Server存在过于宽松的跨域策略，可能导致远程攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
vanna-ai vanna 2.0.0 -

II. Public POCs for CVE-2026-5321

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III. Intelligence Information for CVE-2026-5321

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Vendor Advisories for CVE-2026-5321 (2)

Other References for CVE-2026-5321 (1)

IV. Related Vulnerabilities

Same product: vanna
Same vendor: vanna-ai
Same weakness: CWE-942

V. Comments for CVE-2026-5321

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