CVE-2026-6977Public exploitNetwork attack vector

Unauthenticated API access via default NoAuth backend

Published Apr 25, 2026 · Updated Apr 25, 2026

Missing authentication in Vanna 2.0.0 through 2.0.2 allows remote attackers to access legacy Flask API endpoints without credentials. VannaFlaskApp defaults its authentication backend to NoAuth, whose login check accepts every request before protected /api/v0 routes run. A network-reachable legacy Flask deployment using the default backend exposes configuration and data operations, including SQL execution and training-data changes.

CVSS severityUnavailable
Unscored
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

Missing authentication in Vanna 2.0.0 through 2.0.2 allows remote attackers to access legacy Flask API endpoints without credentials. VannaFlaskApp defaults its authentication backend to NoAuth, whose login check accepts every request before protected /api/v0 routes run. A network-reachable legacy Flask deployment using the default backend exposes configuration and data operations, including SQL execution and training-data changes.

The record

CVE
CVE-2026-6977
Published
Apr 25, 2026
Updated
Apr 25, 2026
Vendor
Vanna AI
Product
Vanna
Classifications
CWE-266, CWE-285, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

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

7.5VulDBAV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:UR
7.3VulDBCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
7.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
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

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-266Incorrect Privilege Assignment
CWE-285Improper Authorization
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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