# pyLoad Has Incomplete Fix for CVE-2026-33509 -storage_folder Bypass via Session Directory in pyLoad

Advisory record · `GHSA-w727-595x-pc3r`

- **Identifiers:** `GHSA-w727-595x-pc3r` · `CVE-2026-45306` · `PYSEC-2026-2998`
- **State:** Confirmed
- **Severity:** CVSS 6.5 Medium
- **Critical:** No
- **Weakness (CWE):** [CWE-706](https://cwe.mitre.org/data/definitions/706.html)
- **Tags:** [CWE-706](https://agentprime.io/advisories/tag/cwe-706.md)
- **Published:** 14 May 2026
- **Updated:** 13 Jul 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 14 May 2026, 20:17 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `pyload-ng` (PyPI): affected `<=0.5.0b3.dev99`; no fixed version yet

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> pyLoad-ng versions up to and including 0.5.0b3.dev99 are affected by an incomplete fix for CVE-2026-33509. The earlier fix blocks setting storage_folder inside the package or user directories but not the Flask session directory. An authenticated user with administrator rights can point storage_folder at the session directory and download other users' session files, which can lead to account takeover. No fixed version is listed.

Written 6 Nov 2026.

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 6.5 Medium, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0023, the 14th percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 15:01 UTC: First seen by agentprime
- 31 Oct 2026, 15:01 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-w727-595x-pc3r)

## Sources

- [GitHub Advisory Database: GHSA-w727-595x-pc3r](https://github.com/advisories/GHSA-w727-595x-pc3r)
- [OSV: GHSA-w727-595x-pc3r](https://osv.dev/vulnerability/GHSA-w727-595x-pc3r)
- <https://github.com/pyload/pyload/security/advisories/GHSA-w727-595x-pc3r>
- <https://nvd.nist.gov/vuln/detail/CVE-2026-45306>
- <https://github.com/advisories/GHSA-r7mc-x6x7-cqxx>
- <https://github.com/pyload/pyload>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-w727-595x-pc3r>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-w727-595x-pc3r/>. Everything for agents: <https://agentprime.io/llms.txt>.