---
id: CVE-2026-44829
title: Gotenberg is a Docker-powered stateless API for PDF files
summary: >-
  Gotenberg is a Docker-powered stateless API for PDF files. In 8.32.0 and
  earlier, filename handling in pkg/modules/api/context.go uses filepath.Base on
  Linux, which does not treat backslashes as path separators, so a multipart
  filename c…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:L'
cwe:
  - CWE-22
published: '2026-08-19'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T21:13:25.910'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-44829'
references:
  - url: >-
      https://github.com/gotenberg/gotenberg/commit/93d0103585372433e18b351bb16edf4c383932d3
    label: security-advisories@github.com
  - url: 'https://github.com/gotenberg/gotenberg/issues/662'
    label: security-advisories@github.com
  - url: 'https://github.com/gotenberg/gotenberg/releases/tag/v8.33.0'
    label: security-advisories@github.com
  - url: >-
      https://github.com/gotenberg/gotenberg/security/advisories/GHSA-hwc4-gmrw-5222
    label: security-advisories@github.com
tags:
  - nvd
epss: 0.00503
epssPercentile: 0.4041
ingestedAt: '2026-09-09T21:22:45.539Z'
---

## Overview

Gotenberg is a Docker-powered stateless API for PDF files. In 8.32.0 and earlier, filename handling in pkg/modules/api/context.go uses filepath.Base on Linux, which does not treat backslashes as path separators, so a multipart filename containing Windows-style parent directory components survives sanitization. The original filename flows through ctx.diskToOriginal and the multi-output PDF routes into archives.FilesFromDisk and archives.Zip.Archive as the generated zip entry name. A remote attacker can submit a name such as ........\Windows\System32\evil.pdf through an upload or an upstream downloadFrom Content-Disposition header, and a Windows archive extractor can write the resulting file outside the intended extraction directory. The affected paths include /forms/pdfengines/split and other multi-output PDF, LibreOffice, and conversion routes, and exploitation can cause arbitrary file writes on a downstream Windows system when a user or process extracts the returned archive. This issue is fixed in version 8.33.0.

## Remediation

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