Path Traversal in Saltcorn

CVE-2026-40163

Saltcorn is an extensible, open source, no-code database application builder. Prior to 1.4.5, 1.5.5, and 1.6.0-beta.4, the POST /sync/offline_changes endpoint allows an unauthenticated attacker to create arbitrary directories and write a changes.json file with attacker-controlled JSON content anywhere on the server filesystem. The GET /sync/upload_finished endpoint allows an unauthenticated attacker to list arbitrary directory contents and read specific JSON files. This vulnerability is fixed in 1.4.5, 1.5.5, and 1.6.0-beta.4.

Vulnerability class: Path Traversal (Directory Traversal)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N.

EPSS exploit prediction

EPSS: 0.004 (35.0th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 35.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-40163: held from 0.003 to 0.004.

EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001

Affected products

  • Saltcorn — versions >= 1.6.0-alpha.0, < 1.6.0-beta.4, >= 1.5.0-beta.0, < 1.5.5, 1.6.0

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-40163?
CVE-2026-40163 is a high-severity vulnerability in Saltcorn, classified under Path Traversal. CVSS score: 8.2/10. Published 2026-04-10.
How severe is CVE-2026-40163?
High severity. CVSS v3 base score is 8.2 out of 10.