Path Traversal in Kopia
CVE-2026-124029
Kopia through 0.23.1 contains a path traversal vulnerability in copyDirectoryContent that allows users with repository write access to escape the restore directory via crafted entry names. Attackers can create snapshots whose directory manifest entries are named '..', so victims restoring with default options write attacker-chosen content outside the restore directory.
Vulnerability class: Path Traversal (Directory Traversal)
Published .
CVSS v3 metric
CVSS v3 base score 5.7 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/kopia/kopia (product)
- github.com/kopia/kopia/blob/v0.23.1/snapshot/restore/restore.go (technical-description)
- GitHub Issue #5700 (issue-tracking)
- VulnCheck Advisory: Kopia through 0.23.1 Path Traversal in Snapshot Restore via Directory Entry Names (third-party-advisory)
Frequently asked questions
- What is CVE-2026-124029?
- CVE-2026-124029 is a medium-severity vulnerability in Kopia, classified under Path Traversal. CVSS score: 5.7/10. Published 2026-11-06.
- How severe is CVE-2026-124029?
- Medium severity. CVSS v3 base score is 5.7 out of 10.