pyLoad SETTINGS Permission Users Can Achieve Remote Code Execution via Unrestricted Reconnect Script Configuration

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

7.5 · CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

• CVE-2026-33509: 0.55% estimated exploitation activity in the next 30 days; percentile 46.06 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary The setconfigvalue() 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 setconfigvalue() is a hardcoded check for general.storagefolder — all other security-critical settings including reconnect.script are writable without any allowlist or path restriction. Details The vulnerability chain spans two components: 1. Unrestricted config write — src/pyload/core/api/init.py:210-243 The Perms.SETTINGS permission (value 128) is a non-admin permission flag. The only hardcoded validation is for general.storagefolder. The reconnect.script option is written directly to config with no path validation, allowlist, or sanitization. 2. Arbitrary script execution —…

Published by the source

20 Mar 2026, 21:50 UTC

Last modified by the source

13 Jul 2026, 16:42 UTC

Source last checked

26 Oct 2026, 13:40 UTC

1. Revision 2 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-r7mc-x6x7-cqxx

2. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-r7mc-x6x7-cqxx

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# Patch Next advisory brief: CVE-2026-33509

Advisory: pyLoad SETTINGS Permission Users Can Achieve Remote Code Execution via Unrestricted Reconnect Script Configuration
IDs: CVE-2026-33509, GHSA-r7mc-x6x7-cqxx
Record: https://patchnext.com/advisories/cve-2026-33509 (revision 2, source checked 26 Oct 2026, 13:40 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 7.5)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor response not established. A vendor fix does not mean a deployment is fixed.

## Affected components
- PyPI pyload-ng: affected >= 0.4.0, <= 0.5.0b3.dev96

## Suggested inspection (read-only)
- `python -m pip show pyload-ng`: prints the installed version. Run with the environment that serves production active.

## Supported action
No complete vendor fix is recorded. Follow the primary source's mitigation guidance and check this record again before closing anything.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on pyload-ng.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-r7mc-x6x7-cqxx (OSV record GHSA-r7mc-x6x7-cqxx lists affected ranges: PyPI pyload-ng >=0.4.0 <=0.5.0b3.dev96)
- Verified: https://github.com/advisories/GHSA-r7mc-x6x7-cqxx (GitHub-reviewed advisory GHSA-r7mc-x6x7-cqxx lists affected ranges: PyPI pyload-ng >=0.4.0 <=0.5.0b3.dev96)

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