# CVE-2025-48879

## Summary

- **CVE ID:** CVE-2025-48879
- **Severity:** MEDIUM
- **CVSS Score:** 6.5 (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
- **CWE:** CWE-140, CWE-835
- **Published:** Jun 10, 2025
- **Last Modified:** Mar 13, 2026

## 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.

## Affected Products

- OctoPrint — OctoPrint (< 1.11.2)

## References

- [CNA](https://github.com/OctoPrint/OctoPrint/security/advisories/GHSA-9wj4-8h85-pgrw)
- [CNA](https://github.com/OctoPrint/OctoPrint/commit/c9c35c17bd820f19c6b12e6c0359fc0cfdd0c1ec)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.24%
- **EPSS Percentile:** 14.8

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._