# CVE-2026-53459

## Summary

- **CVE ID:** CVE-2026-53459
- **Severity:** CRITICAL
- **CVSS Score:** 9.3 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N)
- **CWE:** CWE-636, CWE-755
- **Published:** Sep 15, 2026
- **Last Modified:** Sep 15, 2026

## Description

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.

## Affected Products

- maziggy — bambuddy (>= 0.1.6, < 0.2.4.4)

## References

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

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.42%
- **EPSS Percentile:** 35.6

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._