CVE-2026-33509 pyload-ng: SETTINGS Permission Users Can Achieve Remote Code Execution via Unrestricted Reconnect Script Configuration
Users with SETTINGS permission can achieve remote code execution by modifying the unrestricted reconnect script configuration in pyLoad.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-33509?
CVE-2026-33509 is a high-severity command injection vulnerability in pyload, published on 24 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
pyLoad is a free and open-source download manager written in Python. From version 0.4.0 to before version 0.5.0b3.dev97, the set_config_value() API endpoint allows users with the non-admin SETTINGS permission to modify any configuration option without restriction. The reconnect.script config option controls a file path that is passed directly to subprocess.run() in the thread manager's reconnect logic. A SETTINGS user can set this to any executable file on the system, achieving Remote Code Execution. The only validation in set_config_value() is a hardcoded check for general.storage_folder — all other security-critical settings including reconnect.script are writable without any allowlist or path restriction. This issue has been patched in version 0.5.0b3.dev97.
Weakness: CWE-269
Which versions are affected by CVE-2026-33509?
3 open source packages ship an affected version, including pyload-ng. It affects 2 products.
| Package | Affected | Fixed in |
|---|---|---|
pyload-ng PyPI | From 0.4.0 to 0.5.0b3.dev96 | None |
pyload-ng PyPI | From 0.4.0 to 0.5.0b3.dev96 | None |
pyload-ng PyPI | From 0.4.0 to 0.5.0b3.dev96 | None |
Products include Pyload-Ng Project Pyload-Ng, Pyload Pyload.
How do I fix CVE-2026-33509?
No fix has been published for CVE-2026-33509 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-33509 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-33509 exists.
Other vulnerabilities in pyload
- CVE-2025-54802 pyLoad CNL Blueprint is vulnerable to Path Traversal through `dlc_path` leading to Remote Code Execution (RCE)
- CVE-2024-22416 Cross-Site Request Forgery on any API call in pyLoad may lead to admin privilege escalation
- CVE-2023-0488 Cross-site Scripting (XSS) - Stored in pyload/pyload
- CVE-2026-35459 pyLoad has SSRF fix bypass via HTTP redirect
- CVE-2026-35463 pyLoad has Improper Neutralization of Special Elements used in an OS Command
Sources
Also known as GHSA-r7mc-x6x7-cqxx, PYSEC-2026-2996.