CVE-2026-35459 | THREATINT

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.

PUBLISHED Reserved 2026-04-02 | Published 2026-04-06 | Updated 2026-04-07 | Assigner GitHub_M

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

Problem types

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

Product status

<= 0.5.0b3.dev96

affected

References

github.com/...pyload/security/advisories/GHSA-7gvf-3w72-p2pg

github.com/...ommit/33c55da084320430edfd941b60e3da0eb1be9443

cve.org (CVE-2026-35459)

nvd.nist.gov (CVE-2026-35459)

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