CVE-2024-32977: OctoPrint Authentication Bypass via X-Forwarded-For Header when autologinLocal is enabled

Severity: critical (CVSS 9.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2024-05-14 · updated 2026-06-17
Weakness: CWE-290

Description

OctoPrint provides a web interface for controlling consumer 3D printers. OctoPrint versions up until and including 1.10.0 contain a vulnerability that allows an unauthenticated attacker to completely bypass the authentication if the `autologinLocal` option is enabled within `config.yaml`, even if they come from networks that are not configured as `localNetworks`, spoofing their IP via the `X-Forwarded-For` header. If autologin is not enabled, this vulnerability does not have any impact. The vulnerability has been patched in version 1.10.1. Until the patch has been applied, OctoPrint administrators who have autologin enabled on their instances should disable it and/or to make the instance inaccessible from potentially hostile networks like the internet.

Affected products

OctoPrint: before 1.10.1 — fixed in 1.10.1

How to fix

Upgrade to a fixed version: OctoPrint 1.10.1. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2024-32977 or the next vulnerability affects your stack