CVE-2026-35592Public exploitNetwork attack vector

Sibling-directory file write via path-prefix bypass

Published Apr 7, 2026 · Updated Apr 7, 2026

Path traversal in pyLoad before 0.5.0b3.dev97 allows remote attackers to write files outside the extraction directory through a crafted tar archive. The UnTar _safe_extractall() check compares absolute-path strings with os.path.commonprefix(), so sibling paths sharing the extraction directory's character prefix pass and reach tar.extractall(). Exploitation requires a user to download and extract the archive with the ExtractArchive addon enabled; the demonstrated impact is writing or overwriting files in sibling directories.

CVSS severity5.3
Medium
EPSS probability0.26%
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.dev97 allows remote attackers to write files outside the extraction directory through a crafted tar archive. The UnTar _safe_extractall() check compares absolute-path strings with os.path.commonprefix(), so sibling paths sharing the extraction directory's character prefix pass and reach tar.extractall(). Exploitation requires a user to download and extract the archive with the ExtractArchive addon enabled; the demonstrated impact is writing or overwriting files in sibling directories.

The record

CVE
CVE-2026-35592
Published
Apr 7, 2026
Updated
Apr 7, 2026
Vendor
pyLoad
Product
pyLoad
Classifications
CWE-22, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 7, 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.dev97

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

pyLoad · pyLoadversion=< 0.5.0b3.dev97

Published CVSS scores

5.3GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1204.002Malicious File

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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