CVE-2026-53459 PUBLISHED

Bambuddy is a self-hosted print archive and management system for Bambu Lab 3D printers. Starting in version 0.1.6 and prior to version 0.2.4.4, a fail-open in the authentication code allows any attacker to bypass authentication by flooding a public endpoint to exhaust resources causing database access to fail, granting unauthenticated access to all protected endpoints. Version 0.2.4.4 patches the issue.

• https://github.com/maziggy/bambuddy/security/advisories/GHSA-6mf4-q26m-47pv
• https://github.com/maziggy/bambuddy/commit/845ad39b19bf99afeea571c6bae09695777e1460
• https://github.com/maziggy/bambuddy/blob/449502cc9fc1cec04f06d31512420eac729fd032/backend/app/core/auth.py#L473-L483
• https://github.com/maziggy/bambuddy/blob/449502cc9fc1cec04f06d31512420eac729fd032/backend/app/main.py#L5314-L5316
• https://github.com/maziggy/bambuddy/blob/main/CHANGELOG.md
• https://github.com/maziggy/bambuddy/releases/tag/v0.2.4.4

• CWE-636: Not Failing Securely ('Failing Open') CWE
• CWE-755: Improper Handling of Exceptional Conditions CWE