CVE-2026-35464

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.

• CWE-502
• CWE-863

• https://github.com/pyload/pyload/commit/c4cf995a2803bdbe388addfc2b0f323277efc0e1Patch
• https://github.com/pyload/pyload/security/advisories/GHSA-4744-96p5-mp2jExploit, Mitigation, Vendor Advisory
• https://github.com/pyload/pyload/security/advisories/GHSA-r7mc-x6x7-cqxxExploit, Vendor Advisory
• https://www.cve.org/CVERecord?id=CVE-2026-33509Third Party Advisory
• https://github.com/pyload/pyload/security/advisories/GHSA-4744-96p5-mp2jExploit, Mitigation, Vendor Advisory

Published

Apr 7, 2026

Last Modified

Jun 17, 2026

Status

Analyzed

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