CVE-2026-35459 PUBLISHED

pyLoad has SSRF fix bypass via HTTP redirect

Assigner: GitHub_M
Reserved: 02.04.2026 Published: 06.04.2026 Updated: 06.04.2026

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.

Metrics

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N
CVSS Score: 9.3

Product Status

Vendor pyload
Product pyload
Versions
  • Version <= 0.5.0b3.dev96 is affected

References

Problem Types

  • CWE-918: Server-Side Request Forgery (SSRF) CWE