CVE-2026-5321
vanna-ai vanna FastAPI/Flask Server cross-domain policy
Vexday Risk Score
33Attention
SSVC decision (CISA)
Attend
PoC available → attend closely
CVSS 5.3EPSS 0.2%KEV nãoPoC públicaNuclei —Metasploit —Patch —
Lifecycle
02 Apr 2026Published on NVD
Recommendation: Plan a near-term fix — a public PoC already exists.
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 · vannapublic 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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