Description
OctoPrint provides a web interface for controlling consumer 3D printers. From 2.0.0rc1 until 2.0.0rc7, an authenticated user can supply a crafted default port or baudrate through a connect request to the bundled Serial Connector plugin. OctoPrint persists these values in printerConnection.preferred.parameters.port or printerConnection.preferred.parameters.baudrate and renders them as HTML when another user views the saved connection parameters, allowing script execution in that user's browser and actions within the user's OctoPrint access. This issue is fixed in version 2.0.0rc7.
Published: 2026-11-09
Score: 2.4 Low
EPSS: n/a
KEV: No
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Remediation

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History

Mon, 09 Nov 2026 17:15:00 +0000

Type Values Removed Values Added
Description OctoPrint provides a web interface for controlling consumer 3D printers. From 2.0.0rc1 until 2.0.0rc7, an authenticated user can supply a crafted default port or baudrate through a connect request to the bundled Serial Connector plugin. OctoPrint persists these values in printerConnection.preferred.parameters.port or printerConnection.preferred.parameters.baudrate and renders them as HTML when another user views the saved connection parameters, allowing script execution in that user's browser and actions within the user's OctoPrint access. This issue is fixed in version 2.0.0rc7.
Title OctoPrint: Stored XSS via saved connection parameters
Weaknesses CWE-79
References
Metrics cvssV4_0

{'score': 2.4, 'vector': 'CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:L/SC:L/SI:L/SA:N'}


Subscriptions

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-11-09T17:10:35.399Z

Reserved: 2026-11-05T20:43:10.420Z

Link: CVE-2026-123364

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-11-09T17:17:27.333

Modified: 2026-11-09T17:17:27.487

Link: CVE-2026-123364

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses