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CVE-2026-5321

Published: Apr 2, 2026

Modified: Apr 2, 2026

PUBLISHED

CVSS v3.1

4.3

MEDIUM

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.

Vendor	Product	Versions
vanna-ai	vanna	affected `2.0.0` affected `2.0.1` affected `2.0.2`

Weaknesses (CWE)

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

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

https://github.com/August829/CVEP/issues/14

exploit

issue-tracking

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