CVE-2026-44885Network attack vector

Arbitrary file write via archive path traversal

Published May 28, 2026 · Updated May 28, 2026

Path traversal in Portainer Community Edition 2.33.0 through 2.33.7 allows remote authenticated users to write arbitrary server files. ExtractTarGz in api/archive/targz.go joins an untrusted tar header name to the extraction root and cleans the result without verifying that the resolved path remains beneath that root. Reaching the backup restore operation requires Portainer administrator access; successful exploitation overwrites any path writable by the Portainer process.

CVSS severity5.5
Medium
EPSS probability0.61%
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 Portainer Community Edition 2.33.0 through 2.33.7 allows remote authenticated users to write arbitrary server files. ExtractTarGz in api/archive/targz.go joins an untrusted tar header name to the extraction root and cleans the result without verifying that the resolved path remains beneath that root. Reaching the backup restore operation requires Portainer administrator access; successful exploitation overwrites any path writable by the Portainer process.

The record

CVE
CVE-2026-44885
Published
May 28, 2026
Updated
May 28, 2026
Vendor
Portainer
Product
Portainer Community Edition
Classifications
CWE-22, T1190
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. May 28, 2026CVE publishedPublication date reported by the CVE source.
  2. May 28, 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=>= 2.33.0, < 2.33.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Portainer · Portainer Community Editionversion=>= 2.33.0, < 2.33.8

Published CVSS scores

5.5GitHubCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:L

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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