CVE-2026-35464
pyLoad: Unprotected storage_folder enables arbitrary file write to Flask session store and code execution (Incomplete fix for CVE-2026-33509)
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | pyload-ng | <= 0.5.0b3 | none recorded |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Pyload | Pyload | before 2026-04-02 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-4744-96p5-mp2j
- https://github.com/pyload/pyload/security/advisories/GHSA-4744-96p5-mp2j
- https://github.com/pyload/pyload/security/advisories/GHSA-r7mc-x6x7-cqxx
- https://nvd.nist.gov/vuln/detail/CVE-2026-33509
- https://nvd.nist.gov/vuln/detail/CVE-2026-35464
- https://github.com/pyload/pyload/commit/c4cf995a2803bdbe388addfc2b0f323277efc0e1
- https://www.cve.org/CVERecord?id=CVE-2026-33509