CVE-2025-48879 json
OctoPrint Vulnerable to Denial of Service through malformed HTTP request
published last yr. modified 4mo ago also EUVD-2025-17675 , GHSA-9wj4-8h85-pgrw , PYSEC-2026-1713
- cvss
- 6.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 18%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
Is CVE-2025-48879 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- last yr.
Exploit prediction
0.27% chance of exploitation in the next 30 days, higher than 18% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| GitHub | 3.1 | 6.5 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| OSV | 3.1 | 6.5 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | octoprint | <1.11.2 |
1.11.2 |
Affected products
- OctoPrint OctoPrint
Classification
References
-
github.com
/OctoPrint/OctoPrint/commit/c9c35c17bd820f19c6b12e6c0359fc0cfdd0c1ec
web, patch
-
github.com
/OctoPrint/OctoPrint/security/advisories/GHSA-9wj4-8h85-pgrw
web, mitigation, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2025-48879
advisory
-
github.com
/OctoPrint/OctoPrint
package
-
pypi.org
/project/octoprint
package
-
github.com
/advisories/GHSA-9wj4-8h85-pgrw
advisory
Sources
- CVE List CVE-2025-48879
- GitHub Advisory GHSA-9wj4-8h85-pgrw
- NVD CVE-2025-48879
- OSV PYSEC-2026-1713
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.