CVE-2023-0509 Improper Certificate Validation in pyload/pyload
Attackers can bypass certificate validation in pyload, enabling man-in-the-middle attacks against secure connections.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-0509?
CVE-2023-0509 is a high-severity vulnerability in pyload/pyload, published on 26 Jan 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Improper Certificate Validation in GitHub repository pyload/pyload prior to 0.5.0b3.dev44.
Weakness: CWE-295
Which versions are affected by CVE-2023-0509?
3 open source packages ship an affected version, including pyload-ng. It affects 2 products.
| Package | Affected | Fixed in |
|---|---|---|
pyload-ng PyPI | All versions | 0.5.0b3.dev44 |
pyload-ng PyPI | All versions | 0.5.0b3.dev44 |
pyload-ng PyPI | All versions | 0.5.0b3.dev44 |
Products include Pyload-Ng Project Pyload-Ng, Pyload Pyload.
How do I fix CVE-2023-0509?
Upgrade pyload-ng to 0.5.0b3.dev44 or later.
Is CVE-2023-0509 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-0509 exists.
Other vulnerabilities in pyload/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-8v53-23mx-hcf9, PYSEC-2026-903.