pyLoad: Incomplete Fix for CVE-2026-33509 -storage_folder Bypass via Session Directory
Priority MEDIUM 62CWE-706Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.
Summary
pyLoad is a free and open-source download manager written in Python. Prior to 0.5.0b3.dev100, the fix for CVE-2026-33509 prevents setting storage_folder inside PKGDIR or userdir, but does NOT protect the Flask session directory (/tmp/pyLoad/flask). An authenticated attacker can set storage_folder to the session directory and download session files of other users via /files/get/, leading to account takeover. This vulnerability is fixed in 0.5.0b3.dev100.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00234 14th percentileScored 2026-11-07
Fix Fixed pyload (pyload): 0.5.0b3.dev100
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| pyload | pyload | before 0.5.0b3.dev100 | 0.5.0b3.dev100 | Patch available | CNA |
| — | pyload-ng (PyPI) | up to 0.5.0b3.dev99 | — | No fix listed | GHSA-w727-595x-pc3r |
- pyload Vendorpyload Affected before 0.5.0b3.dev100 Fixed in 0.5.0b3.dev100 Patch available CNA
- pyload-ng (PyPI) Vendor— Affected up to 0.5.0b3.dev99 Fixed in — No fix listed GHSA-w727-595x-pc3r
Remediation
- Fix · CNA pyload (pyload) Fixed in 0.5.0b3.dev100
Timeline
- 2026-10-02 Threatist record created from CVE-2026-45306
- 2026-10-03 Alias added: GHSA-w727-595x-pc3r
References
More pyload vulnerabilities
- TI-2023-00282 Code Injection in pyload/pyload CVSS 3.1CRITICAL 9.8
- TI-2025-34556 pyLoad CNL Blueprint is vulnerable to Path Traversal through `dlc_path` leading to Remote Code Execution (RCE) CVSS 3.1CRITICAL 9.8
- TI-2025-33765 pyLoad vulnerable to remote code execution through js2py onCaptchaResult CVSS 3.1CRITICAL 9.8
- TI-2023-00412 Excessive Attack Surface in pyload/pyload CVSS 3.1CRITICAL 9.8
- TI-2026-27589 pyLoad has SSRF fix bypass via HTTP redirect CVSS 4.0CRITICAL 9.3
- TI-2026-26332 pyLoad: Server-Side Request Forgery via Download Link Submission Enables Cloud Metadata Exfiltration CVSS 4.0CRITICAL 9.3
Sources
- CVE-2026-45306 · CVE Program
- CVE-2026-45306 · NVD
- FIRST EPSS
- GHSA-w727-595x-pc3r · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences