CVE-2026-42315Public exploitNetwork attack vector

Authenticated arbitrary-directory writes via unsanitized folder name

Published May 11, 2026 · Updated May 11, 2026

Path traversal in pyLoad before 0.5.0b3.dev100 allows remote authenticated users to place package downloads in arbitrary directories. The set_package_data() API in src/pyload/core/api/init.py accepts the _folder field without sanitizing or constraining it to the download directory. Perms.MODIFY access and filesystem write permission for the pyLoad process are required, and successful exploitation redirects package output outside the intended directory.

CVSS severity8.1
High
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in pyLoad before 0.5.0b3.dev100 allows remote authenticated users to place package downloads in arbitrary directories. The set_package_data() API in src/pyload/core/api/init.py accepts the _folder field without sanitizing or constraining it to the download directory. Perms.MODIFY access and filesystem write permission for the pyLoad process are required, and successful exploitation redirects package output outside the intended directory.

The record

CVE
CVE-2026-42315
Published
May 11, 2026
Updated
May 11, 2026
Vendor
pyLoad
Product
pyLoad
Classifications
CWE-22, CWE-36, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 11, 2026CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.5.0b3.dev100

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

pyLoad · pyLoadversion=< 0.5.0b3.dev100

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
8.1GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-36Absolute Path Traversal
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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