What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-09 · updated 2026-10-14
• Weakness: CWE-20

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 products

• pyload: before 0.5.0b3.dev101

References

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

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