CVE-2026-35187: pyLoad has SSRF in parse_urls API endpoint via unvalidated URL parameter

Severity: high (CVSS 7.7 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-04-06 · updated 2026-07-24
Weakness: CWE-918

Description

pyLoad is a free and open-source download manager written in Python. In 0.5.0b3.dev96 and earlier, the parse_urls API function in src/pyload/core/api/__init__.py fetches arbitrary URLs server-side via get_url(url) (pycurl) without any URL validation, protocol restriction, or IP blacklist. An authenticated user with ADD permission can make HTTP/HTTPS requests to internal network resources and cloud metadata endpoints, read local files via file:// protocol (pycurl reads the file server-side), interact with internal services via gopher:// and dict:// protocols, and enumerate file existence via error-based oracle (error 37 vs empty response).

Affected products

pyload: before 0.5.0b3.dev97 — fixed in 0.5.0b3.dev97

How to fix

Upgrade to a fixed version: pyload 0.5.0b3.dev97. Check the vendor advisory for mitigations.

References

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