pyLoad: Arbitrary File Write via Path Traversal in edit_package()
Priority MEDIUM 64CWE-23Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · High · Low
- 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. From version 0.5.0b3.dev13 to 0.5.0b3.dev96, the edit_package() function implements insufficient sanitization for the pack_folder parameter. The current protection relies on a single-pass string replacement of "../", which can be bypassed using crafted recursive traversal sequences. This issue has been patched in version 0.5.0b3.dev97.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00571 47th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed pyload (pyload): 0.5.0b3.dev97pyload-ng (PyPI): 0.5.0b3.dev97
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 | 0.5.0b3.dev13 to before 0.5.0b3.dev97 | 0.5.0b3.dev97 | Patch available | CNA |
| — | pyload-ng (PyPI) | 0.5.0b3.dev13 to before 0.5.0b3.dev97 | 0.5.0b3.dev97 | Patch available | GHSA-6px9-j4qr-xfjw |
- pyload Vendorpyload Affected 0.5.0b3.dev13 to before 0.5.0b3.dev97 Fixed in 0.5.0b3.dev97 Patch available CNA
- pyload-ng (PyPI) Vendor— Affected 0.5.0b3.dev13 to before 0.5.0b3.dev97 Fixed in 0.5.0b3.dev97 Patch available GHSA-6px9-j4qr-xfjw
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:pyload-ng_project:pyload-ng:*:*:*:*:*:python:*:* | 0.5.0b3.dev13 to before 0.5.0b3.dev97 | Vulnerable | Pyload-ng Project |
- cpe:2.3:a:pyload-ng_project:pyload-ng:*:*:*:*:*:python:*:* Versions 0.5.0b3.dev13 to before 0.5.0b3.dev97 Vulnerable ·Pyload-ng Project
Remediation
- Fix · CNA pyload (pyload) Fixed in 0.5.0b3.dev97
- Fix · GHSA-6px9-j4qr-xfjw pyload-ng (PyPI) Fixed in 0.5.0b3.dev97 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-29778
- 2026-10-03 Alias added: GHSA-6px9-j4qr-xfjw
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-2026-29778 · CVE Program
- CVE-2026-29778 · NVD
- FIRST EPSS
- GHSA-6px9-j4qr-xfjw · GitHub Advisory Database · CC BY 4.0
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