pyLoad up to 0.5.0b3.dev96 AntiVirus Plugin subprocess.Popen os command injection

Summaryinfo

A vulnerability marked as critical has been reported in pyLoad up to 0.5.0b3.dev96. This vulnerability affects the function subprocess.Popen of the component AntiVirus Plugin. This manipulation causes os command injection. This vulnerability is registered as CVE-2026-35463. Remote exploitation of the attack is possible. No exploit is available. Applying a patch is the recommended action to fix this issue.

Detailsinfo

A vulnerability has been found in pyLoad up to 0.5.0b3.dev96 and classified as critical. Affected by this vulnerability is the function subprocess.Popen of the component AntiVirus Plugin. The manipulation with an unknown input leads to a os command injection vulnerability. The CWE definition for the vulnerability is CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

pyLoad is a free and open-source download manager written in Python. In 0.5.0b3.dev96 and earlier, the ADMIN_ONLY_OPTIONS protection mechanism restricts security-critical configuration values (reconnect scripts, SSL certs, proxy credentials) to admin-only access. However, this protection is only applied to core config options, not to plugin config options. The AntiVirus plugin stores an executable path (avfile) in its config, which is passed directly to subprocess.Popen(). A non-admin user with SETTINGS permission can change this path to achieve remote code execution.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-35463 since 04/02/2026. The exploitation appears to be easy. The attack can be launched remotely. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1202 for this issue.

Applying the patch c4cf995a2803bdbe388addfc2b0f323277efc0e1 is able to eliminate this problem. The bugfix is ready for download at github.com.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Name

• pyLoad

Version

• 0.5.0b3.dev96

License

• open-source

Website

• Product: https://github.com/pyload/pyload/

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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