# CVE-2026-126812: blueprintUE Self-Hosted Edition insecure database default configuration

Source: https://junglewise.ai/threats/cve-2026-126812-blueprintue-self-hosted-edition-before-4-3-7-contains-an  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-11. Updated: 2026-11-11  
License: CC BY 4.0 with a link back

CVE-2026-126812 · Severity: critical · CVSS 9.8 · Published 2026-11-11

blueprintUE Self-Hosted Edition is a self-hosted application for managing blueprints and design workflows. In versions before 4.3.7, the Docker Compose examples enable MariaDB with empty password authentication and expose the database port to the network, allowing anyone with network access to the Docker host to log in as the root database user without credentials and read, modify, or delete all user accounts and stored blueprints.

Technologies: [BlueprintUE Self-Hosted Edition](https://junglewise.ai/threats/technologies/self-hosted-edition). Vendors: [BlueprintUE](https://junglewise.ai/threats/vendors/blueprintue).

## Quick answers

**Is CVE-2026-126812 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-126812 being exploited in the wild.

**How severe is CVE-2026-126812?** Critical severity, with a CVSS score of 9.8, published 11 November 2026.

**Which products and versions are affected?** BlueprintUE Self-Hosted Edition before 4.3.7.

**Is there a fix for CVE-2026-126812?** Yes: fixed in 4.3.7. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-126812 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-126812?** Check whether you run BlueprintUE Self-Hosted Edition at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 4.3.7

## Technical details

The vulnerability results from insecure default configuration in Docker Compose examples that set MYSQL_ALLOW_EMPTY_PASSWORD=yes and expose port 3306, allowing unauthenticated network access to MariaDB. An attacker on the same network as the Docker host can connect to the database service and execute arbitrary SQL commands as the root user, gaining full access to all application data. The issue is resolved in version 4.3.7 by removing the insecure defaults from the example configuration.

## Affected products

- blueprintUE Self-Hosted Edition before 4.3.7

## Timeline

- 2026-11-11: disclosed

## References

- [https://github.com/blueprintue/blueprintue-self-hosted-edition/blob/v4.3.6/docker-examples/database.env](https://github.com/blueprintue/blueprintue-self-hosted-edition/blob/v4.3.6/docker-examples/database.env)
- [https://github.com/blueprintue/blueprintue-self-hosted-edition/blob/v4.3.6/docker-examples/docker-compose-smtp.yml](https://github.com/blueprintue/blueprintue-self-hosted-edition/blob/v4.3.6/docker-examples/docker-compose-smtp.yml)

## Related threats

- [BlueprintUE Self-Hosted Edition resource exhaustion in blueprint creation](https://junglewise.ai/threats/cve-2026-126659-blueprintue-self-hosted-edition-1-0-0-before-4-3-5-contains-a)
- [blueprintUE Self-Hosted Edition account enumeration in password reset](https://junglewise.ai/threats/cve-2026-122139-blueprintue-self-hosted-edition-before-4-3-3-contains-an-account)
- [BlueprintUE Self-Hosted Edition login rate limit bypass](https://junglewise.ai/threats/cve-2026-122138-blueprintue-self-hosted-edition-4-2-0-before-4-3-4-contains-a)