CVE-2026-32731Public exploitNetwork attack vector

Arbitrary file write via unsanitized archive paths

Published Mar 18, 2026 · Updated Mar 18, 2026

Path traversal in @apostrophecms/import-export before 3.5.3 allows remote authenticated users to write arbitrary files via crafted archives. The extract function in gzip.js passes each untrusted tar header name through path.join and opens the result with fs.createWriteStream without verifying that the resolved path remains under the extraction directory. Global Content Modify permission and import access are required; successful exploitation can overwrite any file writable by the Node.js process.

CVSS severity9.9
Critical
EPSS probability0.43%
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 @apostrophecms/import-export before 3.5.3 allows remote authenticated users to write arbitrary files via crafted archives. The extract function in gzip.js passes each untrusted tar header name through path.join and opens the result with fs.createWriteStream without verifying that the resolved path remains under the extraction directory. Global Content Modify permission and import access are required; successful exploitation can overwrite any file writable by the Node.js process.

The record

CVE
CVE-2026-32731
Published
Mar 18, 2026
Updated
Mar 18, 2026
Vendor
ApostropheCMS
Product
@apostrophecms/import-export
Classifications
CWE-22, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 18, 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=< 3.5.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ApostropheCMS · @apostrophecms/import-exportversion=< 3.5.3

Published CVSS scores

9.9GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/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.

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

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('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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