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Vulnerability Details :

CVE-2026-44885

Summary
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
Published At-28 May, 2026 | 20:56
Updated At-29 May, 2026 | 19:11
Rejected At-
Credits

Portainer: Path traversal in backup archive extraction allows arbitrary file write

Portainer Community Edition is a lightweight service delivery platform for containerized applications that can be used to manage Docker, Swarm, Kubernetes and ACI environments. From 2.33.0 to before 2.33.8, Portainer's backup restore feature accepts a .tar.gz archive and extracts it to a target directory on the server. The extraction function (ExtractTarGz in api/archive/targz.go) constructed output paths using filepath.Clean(filepath.Join(outputDirPath, header.Name)). This combination does not prevent directory traversal — a tar entry named ../../etc/cron.d/evil resolves to a path outside the extraction root, so a crafted archive can write files to arbitrary locations on the server filesystem. This vulnerability is fixed in 2.33.8.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:GitHub_M
Assigner Org ID:a0819718-46f1-4df5-94e2-005712e83aaa
Published At:28 May, 2026 | 20:56
Updated At:29 May, 2026 | 19:11
Rejected At:
▼CVE Numbering Authority (CNA)
Portainer: Path traversal in backup archive extraction allows arbitrary file write

Portainer Community Edition is a lightweight service delivery platform for containerized applications that can be used to manage Docker, Swarm, Kubernetes and ACI environments. From 2.33.0 to before 2.33.8, Portainer's backup restore feature accepts a .tar.gz archive and extracts it to a target directory on the server. The extraction function (ExtractTarGz in api/archive/targz.go) constructed output paths using filepath.Clean(filepath.Join(outputDirPath, header.Name)). This combination does not prevent directory traversal — a tar entry named ../../etc/cron.d/evil resolves to a path outside the extraction root, so a crafted archive can write files to arbitrary locations on the server filesystem. This vulnerability is fixed in 2.33.8.

Affected Products
Vendor
portainer
Product
portainer
Versions
Affected
  • >= 2.33.0, < 2.33.8
Problem Types
TypeCWE IDDescription
CWECWE-22CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Type: CWE
CWE ID: CWE-22
Description: CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Metrics
VersionBase scoreBase severityVector
3.15.5MEDIUM
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:L
Version: 3.1
Base score: 5.5
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:L
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/portainer/portainer/security/advisories/GHSA-m8fg-67j7-cx4v
x_refsource_CONFIRM
https://github.com/portainer/portainer-suite/pull/1875
x_refsource_MISC
Hyperlink: https://github.com/portainer/portainer/security/advisories/GHSA-m8fg-67j7-cx4v
Resource:
x_refsource_CONFIRM
Hyperlink: https://github.com/portainer/portainer-suite/pull/1875
Resource:
x_refsource_MISC
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security-advisories@github.com
Published At:28 May, 2026 | 22:16
Updated At:01 Jun, 2026 | 18:08

Portainer Community Edition is a lightweight service delivery platform for containerized applications that can be used to manage Docker, Swarm, Kubernetes and ACI environments. From 2.33.0 to before 2.33.8, Portainer's backup restore feature accepts a .tar.gz archive and extracts it to a target directory on the server. The extraction function (ExtractTarGz in api/archive/targz.go) constructed output paths using filepath.Clean(filepath.Join(outputDirPath, header.Name)). This combination does not prevent directory traversal — a tar entry named ../../etc/cron.d/evil resolves to a path outside the extraction root, so a crafted archive can write files to arbitrary locations on the server filesystem. This vulnerability is fixed in 2.33.8.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.15.5MEDIUM
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:L
Type: Secondary
Version: 3.1
Base score: 5.5
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:L
CPE Matches
portainer
portainer
>>portainer>>Versions from 2.33.0(inclusive) to 2.33.8(exclusive)
cpe:2.3:a:portainer:portainer:*:*:*:*:community:*:*:*
Weaknesses
CWE IDTypeSource
CWE-22Primarysecurity-advisories@github.com
CWE ID: CWE-22
Type: Primary
Source: security-advisories@github.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://github.com/portainer/portainer-suite/pull/1875security-advisories@github.com
Broken Link
https://github.com/portainer/portainer/security/advisories/GHSA-m8fg-67j7-cx4vsecurity-advisories@github.com
Exploit
Third Party Advisory
Hyperlink: https://github.com/portainer/portainer-suite/pull/1875
Source: security-advisories@github.com
Resource:
Broken Link
Hyperlink: https://github.com/portainer/portainer/security/advisories/GHSA-m8fg-67j7-cx4v
Source: security-advisories@github.com
Resource:
Exploit
Third Party Advisory

Change History

0
Information is not available yet

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Details not found