CVE-2026-5321

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

CVSS 5.3 MEDIUMEPSS 0.2%CWE-346 CWE-942

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.

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

Affected products

vanna-ai · vanna

public PoCs found — 1

cve_referencegithub.com/August829/CVEP/issues/14unverified

⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

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References

https://github.com/August829/CVEP/issues/14 https://vuldb.com/submit/780729 https://vuldb.com/vuln/354653 https://vuldb.com/vuln/354653/cti