CVE-2026-55439
Halo: Path Traversal in Backup Download Leads to Arbitrary File Read
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.
INFO
Published Date :
June 25, 2026, 5:16 p.m.
Last Modified :
Oct. 25, 2026, 10:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update Halo to version 2.24.3 or later.
- Verify backup download and creation endpoints function correctly.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-55439.
| URL | Resource |
|---|---|
| https://github.com/halo-dev/halo/issues/10064 | |
| https://github.com/halo-dev/halo/security/advisories/GHSA-h8wj-chr2-hf66 | |
| https://github.com/halo-dev/halo/issues/10064 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-55439 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-55439
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-55439 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-55439 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Oct. 25, 2026
Action Type Old Value New Value Added Translation Title: halo de halo-dev, Description: Halo es una herramienta de código abierto para la creación de sitios web. Antes de la 2.24.3, una vulnerabilidad de salto de ruta en el endpoint de descarga de copias de seguridad permite a los administradores autenticados leer archivos arbitrarios del sistema de archivos del servidor. El endpoint de descarga de copias de seguridad (GET /apis/console.api.migration.halo.run/v1alpha1/backups/{name}/files/{filename}) en MigrationServiceImpl.download() resuelve el nombre de archivo de la copia de seguridad a través de Path.resolve() sin validar que la ruta resuelta permanezca dentro del directorio de copias de seguridad designado. Además, el endpoint de creación de copias de seguridad (POST /apis/migration.halo.run/v1alpha1/backups) no sanea los campos de estado durante la creación. Esta vulnerabilidad está corregida en la 2.24.3. -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 25, 2026
Action Type Old Value New Value Added Reference https://github.com/halo-dev/halo/issues/10064 Added SSVC {'id': 'CVE-2026-55439', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-06-25T18:41:20.038602Z'} -
New CVE Received by [email protected]
Jun. 25, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'halo-dev', 'product': 'halo', 'versions': [{'status': 'affected', 'version': '< 2.24.3'}]}] Added 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. Added CVSS V3.1 AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:L Added CWE CWE-22 Added Reference https://github.com/halo-dev/halo/issues/10064 Added Reference https://github.com/halo-dev/halo/security/advisories/GHSA-h8wj-chr2-hf66