Path Traversal in Lektor
CVE-2026-123619
Lektor through 3.3.14 and 3.4.0b15 contains an absolute path traversal vulnerability in the admin API on Windows that allows attackers to escape the project directory by supplying drive-letter paths that cleanup_path does not normalise. Attackers can use a malicious web page with cross-site requests or DNS rebinding against the unauthenticated local server to recursively delete directories via deleterecord or write attacker-controlled files via newattachment.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:H.
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/lektor/lektor (product)
- github.com/lektor/lektor/blob/v3.3.14/lektor/db.py (technical-description)
- github.com/lektor/lektor/blob/v3.3.14/lektor/utils.py (technical-description)
- github.com/lektor/lektor/issues/1301 (issue-tracking)
- github.com/lektor/lektor/pull/1288 (issue-tracking, patch)
- github.com/lektor/lektor/pull/1302 (issue-tracking, patch)
- www.vulncheck.com/advisories/lektor-through-3.3.14-and-3.4-0b15-path-traversal-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-123619?
- CVE-2026-123619 is a medium-severity vulnerability in Lektor, classified under Absolute Path Traversal. CVSS score: 6.8/10. Published 2026-11-06.
- How severe is CVE-2026-123619?
- Medium severity. CVSS v3 base score is 6.8 out of 10.