Description
pyLoad is a free and open-source download manager written in Python. The fix for CVE-2026-33509 added an ADMIN_ONLY_OPTIONS set to block non-admin users from modifying security-critical config options. The storage_folder option is not in this set and passes the existing path restriction because the Flask session directory is outside both PKGDIR and userdir. A user with SETTINGS and ADD permissions can redirect downloads to the Flask filesystem session store, plant a malicious pickle payload as a predictable session file, and trigger arbitrary code execution when any HTTP request arrives with the corresponding session cookie. This vulnerability is fixed with commit c4cf995a2803bdbe388addfc2b0f323277efc0e1.
Problem types
CWE-502: Deserialization of Untrusted Data
CWE-863: Incorrect Authorization
Product status
References
github.com/...pyload/security/advisories/GHSA-4744-96p5-mp2j
github.com/...pyload/security/advisories/GHSA-4744-96p5-mp2j
github.com/...pyload/security/advisories/GHSA-r7mc-x6x7-cqxx
github.com/...ommit/c4cf995a2803bdbe388addfc2b0f323277efc0e1
www.cve.org/CVERecord?id=CVE-2026-33509