---
id: CVE-2026-45741
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, the IsPublicIP function in pkg/gotenberg/outbound.go does not reject
  the 2002::/16 6to4 prefix, the 64:ff9b::/96 and 64:ff9b:1::/48 NAT64 prefixes,
  the fec…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N'
cwe:
  - CWE-184
  - CWE-918
vendor: gotenberg
product: gotenberg
affected:
  - gotenberg < 8.33.0
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-2026-45741'
references:
  - url: >-
      https://github.com/gotenberg/gotenberg/commit/f9a01c9fb308372170ab7fc97b17a118ee8a125c
    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-86m8-88fq-xfxp
    label: security-advisories@github.com
  - url: >-
      https://github.com/gotenberg/gotenberg/security/advisories/GHSA-86m8-88fq-xfxp
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-08-19T18:41:11.311035Z'
ingestedAt: '2026-09-13T12:15:14.751Z'
epss: 0.00372
epssPercentile: 0.28365
---

## Overview

Gotenberg is a Docker-powered stateless API for PDF files. In 8.32.0 and earlier, the IsPublicIP function in pkg/gotenberg/outbound.go does not reject the 2002::/16 6to4 prefix, the 64:ff9b::/96 and 64:ff9b:1::/48 NAT64 prefixes, the fec0::/10 deprecated site-local prefix, Teredo, and other transition prefixes that can embed or route to non-public IPv4 destinations. The addr.Unmap operation only handles IPv4-mapped IPv6 addresses, so a crafted DNS AAAA record can cause the outbound HTTP client to treat an address wrapping an internal destination such as 169.254.169.254 as public. An unauthenticated attacker can use a conversion route with WithDenyPrivateIPs enabled to reach cloud metadata services, and the Chromium URL conversion route can return the internal response as a PDF, potentially exposing cloud credentials. Exploitation requires a deployment whose host routes the relevant IPv6 prefix, such as a dual-stack or NAT64-enabled environment. This issue is fixed in version 8.33.0.

## Remediation

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