Vulnerability · Published Oct 9, 2026 · Assigned by GitHub_M

CVE-2026-48484pyLoad: Lack of Input Size Validation Leads to Denial of Service (DoS) and Process Termination

Medium 6.5

In plain English

A medium-severity improper input validation in pyload from pyload. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 31% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.4%top 68.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

pyLoad 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	pyload-ng	0.5.0b3.dev101	GHSA-vq8p-m3wm-gv5f
PyPI	pyload-ng	0.5.0b3.dev101	PYSEC-2026-4293

Affected products (as reported)

Vendor	Product	Versions
pyload	pyload	< 0.5.0b3.dev101

Weakness: CWE-20, CWE-400 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References

https://github.com/pyload/pyload/security/advisories/GHSA-vq8p-m3wm-gv5f x_refsource_CONFIRM
https://github.com/pyload/pyload/commit/461cd66f30fa9e96453fb4d8c5c47467e452363c x_refsource_MISC
https://github.com/pyload/pyload/blob/8e447958b8a66c5899775e725a8b90bce6643004/src/pyload/webui/app/blueprints/api_blueprint.py#L73 x_refsource_MISC