---
id: CVE-2026-104059
title: >-
  Lektor 3.3.14 and 3.4.0b15 contains a cross-site request forgery vulnerability
  in the admin API blueprint that allows unauthenticated attackers to perform
  state-changing actions by sending cross-origin requests without CSRF tokens,
  Origi…
summary: >-
  Lektor 3.3.14 and 3.4.0b15 contains a cross-site request forgery vulnerability
  in the admin API blueprint that allows unauthenticated attackers to perform
  state-changing actions by sending cross-origin requests without CSRF tokens,
  Origi…
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H'
cwe:
  - CWE-352
vendor: lektor
product: lektor
affected:
  - lektor <= 3.3.14
  - lektor >= 3.4.0b1 <= 3.4.0b15
published: '2026-10-01'
updated: '2026-10-02'
sourceUpdated: '2026-10-02T18:47:49.947'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-104059'
references:
  - url: 'https://gist.github.com/mansurmavlankulov/c7683e3204e84892e442b0196585d5bb'
    label: disclosure@vulncheck.com
  - url: 'https://www.vulncheck.com/advisories/lektor-csrf-via-admin-api-endpoints'
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
epss: 0.0014
epssPercentile: 0.03357
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-02T15:54:24.629666Z'
ingestedAt: '2026-10-01T18:55:42.391Z'
---

## Overview

Lektor 3.3.14 and 3.4.0b15 contains a cross-site request forgery vulnerability in the admin API blueprint that allows unauthenticated attackers to perform state-changing actions by sending cross-origin requests without CSRF tokens, Origin/Referer validation, CORS configuration, or Host allowlisting. Attackers can exploit the newattachment, deleterecord, build, clean, and publish endpoints from a malicious web page to write arbitrary files, delete pages, wipe build output, trigger deployment publication, and via DNS rebinding reach read endpoints to disclose data.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.