https://cve.radiocsirt.org/rss/recent/all/10 Most recent entries from all 2026-10-15T13:33:14.884623+00:00 Vulnerability-Lookup csirt@opendfir.org python-feedgen Contains only the most 10 recent entries. https://cve.radiocsirt.org/vuln/cve-2026-35464 CVE-2026-35464 — pyLoad has an incomplete fix for CVE-2026-33509: unprotected storage_folder enables arbitrary file write to Flask sessi… 2026-10-15T13:33:14.918267+00:00

Affected: pyload

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.

 https://cve.radiocsirt.org/vuln/pysec-2026-2989 PYSEC-2026-2989 — pyLoad: Unprotected storage_folder enables arbitrary file write to Flask session store and code execution (Incomplete f… 2026-10-15T13:33:14.918329+00:00

Affected: PyPI: pyload-ng

## Summary

The fix for CVE-2026-33509 (GHSA-r7mc-x6x7-cqxx) 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.

## Required Privileges

The chain requires a single non-admin user with both `SETTINGS` (to change `storage_folder`) and `ADD` (to submit a download URL) permissions. These are independent bitmask flags that can be assigned together by an admin. The final RCE trigger is unauthenticated: any HTTP request with the crafted session cookie causes deserialization.

## Root Cause

`storage_folder` at `src/pyload/core/api/__init__.py:238-246` has a path check that blocks writing inside PKGDIR or userdir using `os.path.realpath`. However, Flask's filesystem session directory (`/tmp/pyLoad/flask/` in the standard Docker deployment) is outside both restricted paths.

pyload configures Flask with `SESSION_TYPE = "filesystem"` at `__init__.py:127`. The cachelib `FileSystemCache` stores session files as `md5("session:" + session_id)` and deserializes them with `pickle.load()` on every request that…