What’s Vulnerable › Vulnerabilities

CVE-2026-35459: pyLoad has SSRF fix bypass via HTTP redirect

• Severity: critical (CVSS 9.1 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, 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.

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

• https://github.com/pyload/pyload/commit/33c55da084320430edfd941b60e3da0eb1be9443
• https://github.com/pyload/pyload/security/advisories/GHSA-7gvf-3w72-p2pg

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