pyLoad: Lack of Input Size Validation Leads to Denial of Service (DoS) and Process Termination

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-48484
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-09 17:16:47 UTC
Updated2026-10-14 03:17:29 UTC
DescriptionpyLoad is a free and open-source download manager written in Python. Prior to 0.5.0b3.dev101, the API `rpc` function in `api_blueprint.py` handles `multipart/form-data` uploads by reading the whole content of the uploaded file into memory with `file.read()`. This occurs before the data is sent to the underlying function. Since there is no size limit set at this point, a large file upload can exhaust the server's available memory which led to process termination. Version 0.5.0b3.dev101 contains a patch.

Risk And Classification

Primary CVSS: v3.1 6.5 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.003120000 probability, percentile 0.222260000 (date 2026-10-11)

Problem Types: CWE-20 | CWE-400 | CWE-20 CWE-20: Improper Input Validation | CWE-400 CWE-400: Uncontrolled Resource Consumption

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
3.1CNADECLARED6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Pyload Pyload affected < 0.5.0b3.dev101 Not specified

References

ReferenceSourceLinkTags
github.com/pyload/pyload/commit/461cd66f30fa9e96453fb4d8c5c47467e452363c [email protected] github.com
github.com/pyload/pyload/security/advisories/GHSA-vq8p-m3wm-gv5f 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/pyload/pyload/blob/8e447958b8a66c5899775e725a8b90bce6643004/s... [email protected] github.com
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