What’s Vulnerable › Vulnerabilities

CVE-2026-55439: Halo: Path Traversal in Backup Download Leads to Arbitrary File Read

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-25 · updated 2026-10-25
• Weakness: CWE-22

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.

Affected products

• halo-dev halo: before 2.24.3

References

• 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

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