GHSA-9wj4-8h85-pgrw

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Source
https://github.com/advisories/GHSA-9wj4-8h85-pgrw
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/06/GHSA-9wj4-8h85-pgrw/GHSA-9wj4-8h85-pgrw.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-9wj4-8h85-pgrw
Aliases
Published
2025-06-10T20:14:43Z
Modified
2025-06-10T21:12:11.343851Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
OctoPrint Vulnerable to Denial of Service through malformed HTTP request in OctoPrint
Details

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.

Database specific 
{
    "nvd_published_at": "2025-06-10T16:15:41Z",
    "cwe_ids": [
        "CWE-140",
        "CWE-835"
    ],
    "severity": "MODERATE",
    "github_reviewed": true,
    "github_reviewed_at": "2025-06-10T20:14:43Z"
}
References

Affected packages

PyPI / octoprint

Package

Name
octoprint
View open source insights on deps.dev
Purl
pkg:pypi/octoprint

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.11.2

Affected versions

1.*

1.3.11
1.3.12rc1
1.3.12rc3
1.3.12
1.4.0rc1
1.4.0rc2
1.4.0rc3
1.4.0rc4
1.4.0rc5
1.4.0rc6
1.4.0
1.4.1rc1
1.4.1rc2
1.4.1rc3
1.4.1rc4
1.4.1
1.4.2
1.5.0rc1
1.5.0rc2
1.5.0rc3
1.5.0
1.5.1
1.5.2
1.5.3
1.6.0rc1
1.6.0rc2
1.6.0rc3
1.6.0
1.6.1
1.7.0rc1
1.7.0rc2
1.7.0rc3
1.7.0
1.7.1
1.7.2
1.7.3
1.8.0rc1
1.8.0rc2
1.8.0rc3
1.8.0rc4
1.8.0rc5
1.8.0
1.8.1
1.8.2
1.8.3
1.8.4
1.8.5
1.8.6
1.8.7
1.9.0rc1
1.9.0rc2
1.9.0rc3
1.9.0rc4
1.9.0rc5
1.9.0rc6
1.9.0
1.9.1
1.9.2
1.9.3
1.10.0rc1
1.10.0rc2
1.10.0rc3
1.10.0rc4
1.10.0
1.10.1
1.10.2
1.10.3
1.11.0rc1
1.11.0rc2
1.11.0rc3
1.11.0rc4
1.11.0rc5
1.11.0rc6
1.11.0rc7
1.11.0
1.11.1