Vulnerability · Published May 11, 2026 · Assigned by GitHub_M

CVE-2026-42315pyLoad: Path Traversal via Package Folder Name in set_package_data

High 8.1

In plain English

A high-severity path traversal in pyload from pyload. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 34% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.1High

Exploit odds (30 days)0.4%top 66.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

pyLoad is a free and open-source download manager written in Python. Prior to 0.5.0b3.dev100, when passing a folder name in the set_package_data() API function call inside the data object with key "_folder", there is no sanitization at all, allowing a user with Perms.MODIFY to specify arbitrary directories as download locations for a package. This vulnerability is fixed in 0.5.0b3.dev100.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	pyload-ng	0.5.0b3.dev100	GHSA-838g-gr43-qqg9
PyPI	pyload-ng	0.5.0b3.dev100	PYSEC-2026-129

Affected products (as reported)

Vendor	Product	Versions
pyload	pyload	< 0.5.0b3.dev100

Weakness: CWE-22, CWE-36 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

References

https://github.com/pyload/pyload/security/advisories/GHSA-838g-gr43-qqg9 x_refsource_CONFIRM