Cyber Resilience

CVE-2026-42315

HighPublic PoC

Published: 11 May 2026

Published
11 May 2026
Modified
15 May 2026
KEV Added
Patch
CVSS Score v3.1 8.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
EPSS Score 0.0040 31.4th percentile
Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2026-42315 is a high-severity Path Traversal (CWE-22) vulnerability in Pyload-Ng Project Pyload-Ng. Its CVSS base score is 8.1 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Ingress Tool Transfer (T1105); ranked at the 31.4th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

OWASP Top 10 for Web (2025)

EU & UK References

Vulnerability details

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…

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user with Perms.MODIFY to specify arbitrary directories as download locations for a package. This vulnerability is fixed in 0.5.0b3.dev100.

CWE(s)

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1105 Ingress Tool Transfer Command And Control
Adversaries may transfer tools or other files from an external system into a compromised environment.
Why these techniques?

Path traversal in download location API directly enables writing ingress files to arbitrary paths on the host.

Confidence: MEDIUM · MITRE ATT&CK Enterprise v19.0

CVEs Like This One

CVE-2025-54802Same product: Pyload-Ng Project Pyload-Ng
CVE-2026-29778Same product: Pyload-Ng Project Pyload-Ng
CVE-2026-42313Same product: Pyload-Ng Project Pyload-Ng
CVE-2026-35187Same product: Pyload-Ng Project Pyload-Ng
CVE-2026-35463Same product: Pyload-Ng Project Pyload-Ng
CVE-2026-35459Same product: Pyload-Ng Project Pyload-Ng
CVE-2026-32808Same product: Pyload-Ng Project Pyload-Ng
CVE-2026-33509Same product: Pyload-Ng Project Pyload-Ng
CVE-2026-33511Same product: Pyload-Ng Project Pyload-Ng
CVE-2026-27699Shared CWE-22

Affected Assets

pyload-ng project
pyload-ng
≤ 0.5.0b3.dev100

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

addresses: CWE-22

Validates pathnames and filenames to prevent traversal outside intended directories.

References