Advisory details:
pypa / octoprint/PYSEC-2026-1713
| Advisory ID | pypa/octoprint/PYSEC-2026-1713 |
| Aliases |
CVE-2025-48879
GHSA-9wj4-8h85-pgrw PYSEC-2026-1713 |
| Summary | OctoPrint Vulnerable to Denial of Service through malformed HTTP request in OctoPrint ### Impact 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. This could be used to effectively run a denial of service attack on the OctoPrint server. ### Patches The vulnerability has been patched in version 1.11.2. ### Workaround OctoPrint administrators are once more reminded to not make OctoPrint available on hostile networks (e.g. the internet), regardless of whether this vulnerability is patched or not. ### Details 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 fix adds detection of invalid requests like that and ensures they are handled gracefully with an HTTP 400 Bad Request response. ### Credits This vulnerability was discovered and responsibly disclosed to OctoPrint by Jacopo Tediosi. |
| Status | Published |
| Exploitability | 0.5 |
| Weighted Severity | 5.9 |
| Risk | 3.0 |
| Affected and Fixed Packages | Package Details |
| Introduced and Fixed Package Commit Patches | Package Commit Patches Details |
| There are no known CWE. |
| System | Score | Found at |
|---|---|---|
| cvssv3.1 | 6.5 | https://github.com/pypa/advisory-database/blob/main/vulns/octoprint/PYSEC-2026-1713.yaml |
| Reference id | Reference type | URL |
|---|---|---|
| https://github.com/OctoPrint/OctoPrint | ||
| https://github.com/OctoPrint/OctoPrint/commit/c9c35c17bd820f19c6b12e6c0359fc0cfdd0c1ec | ||
| https://pypi.org/project/octoprint | ||
| CVE-2025-48879 | https://nvd.nist.gov/vuln/detail/CVE-2025-48879 | |
| GHSA-9wj4-8h85-pgrw | https://github.com/advisories/GHSA-9wj4-8h85-pgrw | |
| GHSA-9wj4-8h85-pgrw | https://github.com/OctoPrint/OctoPrint/security/advisories/GHSA-9wj4-8h85-pgrw |
No EPSS data available for this advisory.
| Patch URL | |
|---|---|
| There are no known patches. | |
| Attack Vector (AV) | Attack Complexity (AC) | Privileges Required (PR) | User Interaction (UI) | Scope (S) | Confidentiality Impact (C) | Integrity Impact (I) | Availability Impact (A) |
|---|---|---|---|---|---|---|---|
network adjacent_network local physical |
low high |
none low high |
none required |
unchanged changed |
high low none |
high low none |
high low none |
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-06-10T15:57:28Z/
Decision: Track
Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2025/48xxx/CVE-2025-48879.json
Source Advisory: vulnrichment/CVE-2025-48879
[{'Exploitation': 'none'},
{'Automatable': 'no'},
{'Technical Impact': 'partial'},
{'Mission Prevalence': 'minimal'},
{'Public Well-being Impact': 'material'},
{'Mission & Well-being': 'medium'}]