CVE-2026-42314
published 2026-05-11CVE-2026-42314: pyLoad is a free and open-source download manager written in Python. Prior to 0.5.0b3.dev100, package folder names are sanitized using insufficient string…
PriorityP338medium6.5CVSS 3.1
AVNACLPRLUINSUCNIHAN
EPSS
0.34%
26.0th percentile
pyLoad is a free and open-source download manager written in Python. Prior to 0.5.0b3.dev100, package folder names are sanitized using insufficient string replacement. The pattern ....// becomes .._ after replacement (partial removal), leaving .. which can be exploited when the path is later resolved by the OS. This vulnerability is fixed in 0.5.0b3.dev100.
Affected
3 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| pyload-ng_project | pyload-ng | < 0.5.0b3.dev100 | 0.5.0b3.dev100 |
| pyload-ng_project | pyload-ng | >= 0 < 0.5.0b3.dev100 | 0.5.0b3.dev100 |
| pyload | pyload | < 0.5.0b3.dev100 | 0.5.0b3.dev100 |
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VulDB
pyLoad up to 0.5.0b3.dev98 Package Folder Name path traversal
vuldb·2026-05-11·CVSS 6.5
CVE-2026-42314 [MEDIUM] pyLoad up to 0.5.0b3.dev98 Package Folder Name path traversal
A vulnerability classified as critical has been found in pyLoad. Affected is an unknown function of the component Package Folder Name Handler. The manipulation leads to path traversal.
This vulnerability is traded as CVE-2026-42314. It is possible to initiate the attack remotely. There is no exploit available.
It is recommended to upgrade the affected component.
GHSA
PyLoad Vulnerable to Path Traversal via Package Folder Name
ghsa·2026-05-05
CVE-2026-42314 [MEDIUM] CWE-22 PyLoad Vulnerable to Path Traversal via Package Folder Name
PyLoad Vulnerable to Path Traversal via Package Folder Name
Insufficient sanitization of package folder names allows writing files outside the intended download directory.
## Affected Component
- `src/pyload/core/api/__init__.py`
- Function: `add_package()`
## Description
Package folder names are sanitized using insufficient string replacement:
```python
folder = (
folder.replace("http://", "")
.replace("https://", "")
.replace("../", "_") # Bypassable!
.replace("..\\", "_")
.replace(":", "")
.replace("/", "_")
.replace("\\", "_")
)
```
The `../` replacement is bypassable. The pattern `....//` becomes `.._` after replacement (partial removal), leaving `..` which can be exploited when the path is later resolved by the OS.
## Proof of Concept
### Setup
```bash
pip install pyload-ng[al
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2026-05-11
Published