What’s Vulnerable › Vulnerabilities

CVE-2026-35163: OctoPrint: XSS in Suppressed Command Notifications

• Severity: medium (CVSS 4.6 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-21 · updated 2026-10-14
• Weakness: CWE-80

Description

OctoPrint provides a web interface for controlling consumer 3D printers. Prior to 1.11.8 and 2.0.0rc3, Suppressed Command notification popups use PNotify rendering for printer-controlled payload.command and payload.message values in src/octoprint/static/js/app/viewmodels/terminal.js without HTML escaping. An attacker who convinces a victim to print a crafted file can inject HTML and JavaScript into the notification, disrupt prints, read information available to the victim including sensitive settings when permitted, or perform actions in the victim's OctoPrint session. This issue is fixed in versions 1.11.8 and 2.0.0rc3.

Affected products

• OctoPrint: before 1.11.8; from 2.0.0rc1, < 2.0.0rc3

References

• https://github.com/OctoPrint/OctoPrint/commit/42e0f9863935e136f04ed3c560cb96483a580d1b
• https://github.com/OctoPrint/OctoPrint/commit/6e3db9096f8a94f7c2249be24b6d03a7d9c12bc7
• https://github.com/OctoPrint/OctoPrint/releases/tag/1.11.8
• https://github.com/OctoPrint/OctoPrint/releases/tag/2.0.0rc3
• https://github.com/OctoPrint/OctoPrint/security/advisories/GHSA-p6qx-ghxm-389h

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