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CVE-2026-5321

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

MEDIUM
4.3
CVSS Score
Published: April 2, 2026 at 04:45 AM UTC
Updated: June 17, 2026 at 10:58 AM UTC
1 product affected across 1 vendorVanna

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Severity
MEDIUM4.3
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (4)

VDB Entry
Source: cverecord
https://vuldb.com/vuln/354653
SignaturePermissions Required
Source: cverecord
https://vuldb.com/vuln/354653/cti
Third Party Advisory
Source: cverecord
https://vuldb.com/submit/780729
ExploitIssue Tracking
Source: cverecord
https://github.com/August829/CVEP/issues/14

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.3MEDIUMVulDB
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-942CWE-346

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