blueprintue-self-hosted-edition: Empty Password in Configuration File
CVE-2026-126812 is a critical-severity empty password in configuration file vulnerability in blueprintue-self-hosted-edition from Blueprintue, with a CVSS 3.1 base score of 9.8 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. The record lists version 4.3.7 as the first without the flaw, so updating blueprintue-self-hosted-edition to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.6% chance of exploitation within 30 days, which is low compared with other CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Update blueprintue-self-hosted-edition to 4.3.7 or a later version.
- Read the advisory on github.com for workarounds and exact fixed builds.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Blueprintue | blueprintue-self-hosted-edition | 1.0.0 up to, but not including, 4.3.7 | 4.3.7 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by CNA (vulncheck.com).
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 4.0 | 9.3 | Critical | CNA (vulncheck.com) |
| CVSS 3.1 | 9.8 | Critical | CNA (vulncheck.com) |
Official description
blueprintUE Self-Hosted Edition before 4.3.7 contains an insecure default configuration in its Docker Compose examples that sets MYSQL_ALLOW_EMPTY_PASSWORD=yes in database.env and publishes MariaDB on port 3306. Unauthenticated attackers reaching the Docker host on port 3306 can log in as root without a password to read, modify, or delete user accounts, blueprints, and all databases.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Empty Password in Configuration File
Using an empty string as a password is insecure.
More Empty Password in Configuration File vulnerabilities (CWE-258)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: poc, automatable: yes, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Advisories
Patches and release notes
Other references
- github.com/blueprintue/blueprintue-self-hosted-edition/blob/v4.3.6/docker-examples/database.env
- github.com/blueprintue/blueprintue-self-hosted-edition/blob/v4.3.6/docker-examples/docker-compose-smtp.yml#L1…
- vulncheck.com/advisories/blueprintue-self-hosted-edition-before-4.3.7-empty-mariadb-root-password-via-docker-…
Other vulnerabilities in blueprintue-self-hosted-edition
- 7.5 High severity
- 8.1 High severity
- 7.5 High severity
- 7.4 High severity
Recent Empty Password in Configuration File vulnerabilities
- 9.8 Critical severity
- 7.5 High severity
- 7.3 High severity
- 9.8 Critical severity
- 8.8 High severity
- 9.8 Critical severity
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