What is CVE-2026-55439?

CVE-2026-55439 is a medium-severity vulnerability in Halo-dev Halo, classified under Path Traversal. CVSS score: 5.5/10. Published 2026-06-25.

How severe is CVE-2026-55439?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Path Traversal in Halo-dev Halo

CVE-2026-55439

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 endpo…

Vulnerability class: Path Traversal (Directory Traversal)

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:L.

Affected products

Halo-dev Halo — versions < 2.24.3

Weakness classification (CWE)

CWE-22 — Path Traversal

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-55439?: CVE-2026-55439 is a medium-severity vulnerability in Halo-dev Halo, classified under Path Traversal. CVSS score: 5.5/10. Published 2026-06-25.
How severe is CVE-2026-55439?: Medium severity. CVSS v3 base score is 5.5 out of 10.