CVE-2026-4231Public exploitNetwork attack vector

Unauthenticated internal-resource access via DuckDB SQL functions

Published Mar 16, 2026 · Updated Mar 16, 2026

Server-side request forgery in Vanna AI Vanna 2.0.0 through 2.0.2 allows remote attackers to access internal URLs through the Flask API. update_sql caches an attacker-controlled SELECT statement, and run_sql sends it to DuckDB without restricting network-capable functions such as read_csv_auto. Exploitation requires the DuckDB backend and reachable legacy Flask endpoints; the default NoAuth configuration permits the returned internal-resource data to be read without credentials.

CVSS severity7.3
High
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Server-side request forgery in Vanna AI Vanna 2.0.0 through 2.0.2 allows remote attackers to access internal URLs through the Flask API. update_sql caches an attacker-controlled SELECT statement, and run_sql sends it to DuckDB without restricting network-capable functions such as read_csv_auto. Exploitation requires the DuckDB backend and reachable legacy Flask endpoints; the default NoAuth configuration permits the returned internal-resource data to be read without credentials.

The record

CVE
CVE-2026-4231
Published
Mar 16, 2026
Updated
Mar 16, 2026
Vendor
Vanna AI
Product
Vanna
Classifications
CWE-918, CAPEC-664, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 16, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.0.0
  2. Affected versionversion=2.0.1
  3. Affected versionversion=2.0.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Vanna AI · Vannaversion=2.0.0; version=2.0.1; version=2.0.2

Published CVSS scores

5.5VulDBCVSS: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
7.5VulDBAV:N/AC:L/Au:N/C:P/I:P/A:P
7.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
CAPEC-664Server Side Request Forgery
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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