---
id: CVE-2026-45742
title: Gotenberg is a Docker-powered stateless API for PDF files
summary: >-
  Gotenberg is a Docker-powered stateless API for PDF files. From 8.10.0 until
  8.33.0, the newContext function in pkg/modules/api/context.go starts one
  errgroup.Go goroutine for each multipart downloadFrom entry and allows those
  goroutines…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-362
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-2026-45742'
references:
  - url: >-
      https://github.com/gotenberg/gotenberg/commit/6671b5e5d30289087ca80130fc76f130cfa4dd7b
    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-vp73-vjw8-8f32
    label: security-advisories@github.com
  - url: >-
      https://github.com/gotenberg/gotenberg/security/advisories/GHSA-vp73-vjw8-8f32
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
epss: 0.00705
epssPercentile: 0.51329
ingestedAt: '2026-09-09T21:22:45.539Z'
---

## Overview

Gotenberg is a Docker-powered stateless API for PDF files. From 8.10.0 until 8.33.0, the newContext function in pkg/modules/api/context.go starts one errgroup.Go goroutine for each multipart downloadFrom entry and allows those goroutines to concurrently write to the shared ctx.files, ctx.diskToOriginal, and ctx.filesByField maps and slices. Go maps and slices are not safe for concurrent mutation, so a crafted multipart request containing many downloadFrom entries can trigger a data race and terminate the process with a fatal concurrent map writes runtime error. The default configuration enables downloadFrom and disables authentication, allowing an unauthenticated remote attacker to crash an exposed conversion service and cause a denial of service. This issue is fixed in version 8.33.0.

## Remediation

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