CVE-2026-8387Public exploitNetwork attack vector

Arbitrary file write via unchecked ZIP paths

Published Jul 1, 2026 · Updated Jul 1, 2026

Relative path traversal in ClearML Python Package before 2.1.6 allows attackers to write files outside the extraction cache. StorageManager._extract_to_cache() passes ZIP member names to ZipFile.extractall() without confirming that resolved paths remain within the cache directory. Remote attackers need high privileges and user interaction to supply a crafted dataset, artifact, model, or offline session; overwriting executable paths can yield code execution.

CVSS severity2.4
Low
EPSS probability0.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Relative path traversal in ClearML Python Package before 2.1.6 allows attackers to write files outside the extraction cache. StorageManager._extract_to_cache() passes ZIP member names to ZipFile.extractall() without confirming that resolved paths remain within the cache directory. Remote attackers need high privileges and user interaction to supply a crafted dataset, artifact, model, or offline session; overwriting executable paths can yield code execution.

The record

CVE
CVE-2026-8387
Published
Jul 1, 2026
Updated
Jul 1, 2026
Vendor
Allegro AI
Product
ClearML Python Package
Classifications
CWE-23, T1204.002
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jul 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 1, 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=unspecified <2.1.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Allegro AI · ClearML Python Packageversion=unspecified <2.1.6

Published CVSS scores

2.4huntr.devCVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-23Relative 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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