CVE-2025-48879 Details
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.
A denial-of-service vulnerability has been identified in OctoPrint versions prior to 1.11.2. This issue allows any unauthenticated attacker to send a manipulated multipart/form-data request that disrupts the OctoPrint web server. The vulnerability arises when the request lacks a proper end boundary, causing the server to enter an endless loop searching for a missing part. Since Tornado, the underlying web framework, operates in a single-threaded manner, this loop effectively freezes the entire web server.
Users can upgrade to OctoPrint version 1.11.2 or later to address this vulnerability. Additionally, OctoPrint administrators are advised not to expose the application to untrusted networks, such as the internet.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jun 10, 2025References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/OctoPrint/OctoPrint/commit/c9c35c17bd820f19c6b12e6c0359fc0cfdd0c1ec | [email protected] | Patch |
| https://github.com/OctoPrint/OctoPrint/security/advisories/GHSA-9wj4-8h85-pgrw | [email protected] | MitigationVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-140 | Improper Neutralization of Delimiters | [email protected] |
| CWE-835 | Loop with Unreachable Exit Condition ('Infinite Loop') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| octoprint octoprint | < 1.11.2 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Aug 12, 2025 | Initial Analysis | [email protected] |
| Jun 10, 2025 | New CVE Received | [email protected] |