CVE-2026-55439CWE-22

Halo: Path Traversal in Backup Download Leads to Arbitrary File Read

Medium · published June 25, 2026

CVSS v3.1
5.5
EPSS
1%
Percentile
42.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:L
CVSS v4.0
Not supplied
EPSS
0.00505 · 42.2th percentile
Weakness
CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Published
2026-06-25T15:57Z
EPSS history
Timeline
  • 25 JUN 15:57Z
    Halo: Path Traversal in Backup Download Leads to Arbitrary File Read
    cvelistv5