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PYSEC-2026-2688

MediumCVSS 4.6 / 10

Published Jul 13, 2026·Last modified Jul 13, 2026

Affected Components(0)

No affected components available

Description

Impact

OctoPrint versions up to and including 1.11.7 as well as 2.0.0rc1 and 2.0.0rc2 are affected by a vulnerability that allows injection of arbitrary HTML and JavaScript into Suppressed Command notifications popups generated by the printer.

An attacker who successfully convinces a victim to print a specially crafted file could exploit this issue to disrupt ongoing prints, extract information (including sensitive configuration settings, if the targeted user has the necessary permissions for that), or perform other actions on behalf of the targeted user within the OctoPrint instance.

Patches

The vulnerability has been patched in version 1.11.8 and 2.0.0rc3.

Workaround

OctoPrint administrators can mitigate the risk by disabling popups:

for Action Command notifications, set OctoPrint Settings -> Serial Connection -> Behaviour -> Sanity Checking -> Display notifications for suppressed commands to Never show notifications

It is also strongly recommended to ensure that files being printed originate from trusted sources, and, whenever possible, are sliced with an application's own slicer.

Credits

This vulnerability was discovered and responsibly disclosed to OctoPrint by Jacopo Tediosi.

Timeline

2026-03-18: Report received 2026-04-01: Report verified 2026-04-01: Fix ready for 2.0.0 2026-06-22: Fix backported to 1.11.x 2026-06-23: Fix released with 1.11.8 and 2.0.0rc3

Risk Scores

Base Score

4.6

The vulnerability requires local access to the device to be exploited. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights.

Threat Intelligence

1.0

Limited exploitation activity has been observed. Close monitoring and planned remediation are recommended.

EPSS

N/A

Probability that this vulnerability will be exploited in the wild within the next 30 days.

Exploit

Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

Related Vulnerabilities

CVE-2026-35163
Alias

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Medium severity

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