EUVD-2026-25653Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
8DescriptionCVE.org
A security vulnerability has been detected in vanna-ai vanna up to 2.0.2. The affected element is an unknown function of the component Legacy Flask API. The manipulation leads to improper authorization. It is possible to initiate the attack remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
AnalysisAI
Improper authorization in Vanna AI's Legacy Flask API allows remote unauthenticated attackers to bypass authentication controls and gain unauthorized access. Affects Vanna versions up to 2.0.2. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the Legacy Flask API component to be enabled and network-accessible in Vanna installations through version 2.0.2. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Real-world risk is HIGH based on converging threat signals. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An external attacker identifies a Vanna AI instance with the Legacy Flask API exposed on the internet, discoverable via Shodan or direct port scanning. The attacker references the public proof-of-concept at https://github.com/yidaozhongqing/York/issues/2 to craft malicious HTTP requests targeting authorization-bypass endpoints. … |
| Remediation | Upstream fix version not independently confirmed at time of analysis. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Identify all systems running Vanna AI versions ≤2.0.2 and isolate them from production networks or restrict API access via firewall rules to trusted IPs only. …
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