CVE-2026-35459

Critical

Description

pyLoad is a free and open-source download manager written in Python. In 0.5.0b3.dev96 and earlier, pyLoad has a server-side request forgery (SSRF) vulnerability. The fix for CVE-2026-33992 added IP validation to BaseDownloader.download() that checks the hostname of the initial download URL. However, pycurl is configured with FOLLOWLOCATION=1 and MAXREDIRS=10, causing it to automatically follow HTTP redirects. Redirect targets are never validated against the SSRF filter. An authenticated user with ADD permission can bypass the SSRF fix by submitting a URL that redirects to an internal address.

SeverityCritical

CVSS9.1

Exploit probability—

ProductPyload-ng

PublishedApr 6, 2026

First seenApr 6, 2026

Weakness typeCWE-918Server-side request forgery (SSRF)

How to fix

Update

pyload-ng_project pyload-ng0.5.0b3.dev97 or later

Affected products

Product	Affected versions	Fixed in
pyload-ng_project pyload-ng	v < 0.5.0b3.dev97	0.5.0b3.dev97
pyload-ngPyPI	v ≤ 0.5.0b3.dev96	—

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