CVE-2025-48879

OctoPrint Vulnerable to Denial of Service through malformed HTTP request

Published Jun 10, 2025 CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Description
OctoPrint versions up until and including 1.11.1 contain a vulnerability that allows any unauthenticated attacker to send a manipulated broken multipart/form-data request to OctoPrint and through that make the web server component become unresponsive. The issue can be triggered by a broken multipart/form-data request lacking an end boundary to any of OctoPrint's endpoints implemented through the octoprint.server.util.tornado.UploadStorageFallbackHandler request handler. The request handler will get stuck in an endless busy loop, looking for a part of the request that will never come. As Tornado is single-threaded, that will effectively block the whole web server. The vulnerability has been patched in version 1.11.2.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-17675 OctoPrint Vulnerable to Denial of Service through malformed HTTP request in OctoPrint
Github GHSA Github GHSA GHSA-9wj4-8h85-pgrw OctoPrint Vulnerable to Denial of Service through malformed HTTP request in OctoPrint
History
Type Values Removed Values Added
CPEs cpe:2.3:a:octoprint:octoprint:*:*:*:*:*:*:*:*
Type Values Removed Values Added
Metrics epss

{'score': 0.0003}

epss

{'score': 0.00045}

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description OctoPrint versions up until and including 1.11.1 contain a vulnerability that allows any unauthenticated attacker to send a manipulated broken multipart/form-data request to OctoPrint and through that make the web server component become unresponsive. The issue can be triggered by a broken multipart/form-data request lacking an end boundary to any of OctoPrint's endpoints implemented through the octoprint.server.util.tornado.UploadStorageFallbackHandler request handler. The request handler will get stuck in an endless busy loop, looking for a part of the request that will never come. As Tornado is single-threaded, that will effectively block the whole web server. The vulnerability has been patched in version 1.11.2.
Title OctoPrint Vulnerable to Denial of Service through malformed HTTP request
Weaknesses CWE-140
CWE-835
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Jun 10, 2025, 3:57 PM
Reserved
May 27, 2025, 8:14 PM
Status
Analyzed
Published
Jun 10, 2025, 4:15 PM
Modified
Jun 17, 2026, 9:30 AM