CVE-2026-55439: CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in halo-dev halo
Halo is an open source website building tool. Prior to 2.24.3, a path traversal vulnerability in the backup download endpoint allows authenticated administrators to read arbitrary files from the server filesystem. The backup download endpoint (GET /apis/console.api.migration.halo.run/v1alpha1/backups/{name}/files/{filename}) in MigrationServiceImpl.download() resolves the backup filename via Path.resolve() without validating that the resolved path stays within the designated backups directory. Also, the Backup creation endpoint (POST /apis/migration.halo.run/v1alpha1/backups) does not sanitize the status fields during creation This vulnerability is fixed in 2.24.3.
AI Analysis
Technical Summary
CVE-2026-55439 is a path traversal vulnerability (CWE-22) in the halo-dev halo product affecting versions before 2.24.3. The issue arises because the backup download endpoint (GET /apis/console.api.migration.halo.run/v1alpha1/backups/{name}/files/{filename}) resolves file paths using Path.resolve() without verifying that the resolved path remains within the intended backups directory. This allows authenticated administrators to read arbitrary files from the server filesystem. Additionally, the backup creation endpoint (POST /apis/migration.halo.run/v1alpha1/backups) fails to sanitize status fields during backup creation. The vulnerability is addressed in version 2.24.3.
Potential Impact
An authenticated administrator can exploit this vulnerability to read arbitrary files on the server filesystem, potentially exposing sensitive data. The vulnerability does not affect confidentiality, integrity, or availability beyond unauthorized file disclosure. There are no known exploits in the wild.
Mitigation Recommendations
Upgrade to halo version 2.24.3 or later, where this vulnerability is fixed. Patch status is confirmed by the vendor advisory indicating the fix in 2.24.3. No additional mitigations are specified.
CVE-2026-55439: CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in halo-dev halo
Description
Halo is an open source website building tool. Prior to 2.24.3, a path traversal vulnerability in the backup download endpoint allows authenticated administrators to read arbitrary files from the server filesystem. The backup download endpoint (GET /apis/console.api.migration.halo.run/v1alpha1/backups/{name}/files/{filename}) in MigrationServiceImpl.download() resolves the backup filename via Path.resolve() without validating that the resolved path stays within the designated backups directory. Also, the Backup creation endpoint (POST /apis/migration.halo.run/v1alpha1/backups) does not sanitize the status fields during creation This vulnerability is fixed in 2.24.3.
CVSS v3.1
Score 5.5medium
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-55439 is a path traversal vulnerability (CWE-22) in the halo-dev halo product affecting versions before 2.24.3. The issue arises because the backup download endpoint (GET /apis/console.api.migration.halo.run/v1alpha1/backups/{name}/files/{filename}) resolves file paths using Path.resolve() without verifying that the resolved path remains within the intended backups directory. This allows authenticated administrators to read arbitrary files from the server filesystem. Additionally, the backup creation endpoint (POST /apis/migration.halo.run/v1alpha1/backups) fails to sanitize status fields during backup creation. The vulnerability is addressed in version 2.24.3.
Potential Impact
An authenticated administrator can exploit this vulnerability to read arbitrary files on the server filesystem, potentially exposing sensitive data. The vulnerability does not affect confidentiality, integrity, or availability beyond unauthorized file disclosure. There are no known exploits in the wild.
Mitigation Recommendations
Upgrade to halo version 2.24.3 or later, where this vulnerability is fixed. Patch status is confirmed by the vendor advisory indicating the fix in 2.24.3. No additional mitigations are specified.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-16T21:59:57.017Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a3d5b514853345fc13372c5
Added to database: 06/25/2026, 16:46:09 UTC
Last enriched: 06/25/2026, 17:02:02 UTC
Last updated: 06/25/2026, 22:46:39 UTC
Views: 8
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