CVE-2026-33314 pyload-ng: Improper Authentication and Origin Validation Error

What is CVE-2026-33314?

CVE-2026-33314 is a medium-severity authentication bypass vulnerability in pyload, published on 24 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

pyLoad is a free and open-source download manager written in Python. Prior to version 0.5.0b3.dev97, a Host Header Spoofing vulnerability in the @local_check decorator allows unauthenticated external attackers to bypass local-only restrictions. This grants access to the Click'N'Load API endpoints, enabling attackers to remotely queue arbitrary downloads, leading to Server-Side Request Forgery (SSRF) and Denial of Service (DoS). This issue has been patched in version 0.5.0b3.dev97.

Weakness: CWE-346, CWE-287

Which versions are affected by CVE-2026-33314?

3 open source packages ship an affected version, including pyload-ng. It affects 1 product.

Products include Pyload-Ng Project Pyload-Ng.

How do I fix CVE-2026-33314?

Upgrade pyload-ng to 0.5.0b3.dev97 or later.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2026-33314 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-33314 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) Critical 9.8
• CVE-2024-22416 Cross-Site Request Forgery on any API call in pyLoad may lead to admin privilege escalation Critical 9.7
• CVE-2023-0488 Cross-site Scripting (XSS) - Stored in pyload/pyload Critical 9.6
• CVE-2026-35459 pyLoad has SSRF fix bypass via HTTP redirect Critical 9.3
• CVE-2026-35463 pyLoad has Improper Neutralization of Special Elements used in an OS Command High 8.8

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-q485-cg9q-xq2r, PYSEC-2026-122.