OctoPrint has Timing Side-Channel Vulnerability in API Key Authentication
Impact
OctoPrint versions up to and including 1.11.5 are affected by a (theoretical) timing attack vulnerability that allows API key extraction over the network.
Due to using character based comparison that short-circuits on the first mismatched character during API key validation, rather than a cryptographical method with static runtime regardless of the point of mismatch, an attacker with network based access to an affected OctoPrint could extract API keys valid on the instance by measuring the response times of the denied access responses and guess an API key character by character.
Patches
The vulnerability will be patched in version 1.11.6.
Workaround
The likelihood of this attack actually working is highly dependent on the network's latency, noise and similar parameters. An actual proof of concept was not achieved so far. Still, as always administrators are advised to not expose their OctoPrint instance on hostile networks, especially not on the public Internet!
Credits
This vulnerability was discovered and responsibly disclosed to OctoPrint by Knox Liu.
Software afectado
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| Plataforma | Paquete | Versiones vulnerables | Corregida en |
|---|---|---|---|
| Python (PyPI) | octoprint | < 1.11.6 | 1.11.6 |
Referencias
- https://github.com/OctoPrint/OctoPrint/security/advisories/GHSA-xg4x-w2j3-57h6
- https://nvd.nist.gov/vuln/detail/CVE-2026-23892
- https://github.com/OctoPrint/OctoPrint/commit/249fd80ab01bc4b7dabedff768230a0fb5d01a8c
- https://github.com/OctoPrint/OctoPrint
- https://github.com/OctoPrint/OctoPrint/releases/tag/1.11.6
- https://pypi.org/project/octoprint
- https://github.com/advisories/GHSA-xg4x-w2j3-57h6
- Vector CVSS
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N- Debilidad (CWE)
CWE-208- Plataforma
- Python (PyPI)
- Paquete
octoprint- Publicada
- 27.01.2026
- Actualizado
- 11.10.2026 13:19
Fuentes y licencias
OSV / GitHub Advisory Database - PYSEC-2026-1716 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-xg4x-w2j3-57h6 - CC BY 4.0
Historial de vulnerabilidades: octoprint
Todas las vulnerabilidades publicadas de este paquete (Python (PyPI)), de la más reciente a la más antigua. Muestra si es un fallo aislado o un paquete que hay que vigilar.
- Entradas en total
- 24
- Primera → última
- 05.2021 06.2026
- Sin corrección
- 1
- Explotada en ataques
- 0
Distribución por gravedad
- Crítica 1
- Alta 8
- Media 13
- Baja 2
Divulgaciones por año
- 2021: 2
- 2022: 8
- 2023: 1
- 2024: 5
- 2025: 5
- 2026: 3
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OctoPrint has Timing Side-Channel Vulnerability in API Key Authentication esta entrada
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