---
id: CVE-2026-105689
title: Penpot is an open-source design and prototyping platform
summary: >-
  Penpot is an open-source design and prototyping platform. Prior to 2.18.0,
  app.util.ssrf/blocked-address? relies on Java InetAddress predicates that do
  not classify NAT64, 6to4, or Teredo addresses and applies additional CIDR
  checks only…
severity: medium
cvss: 6
cvssVector: 'CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:N/VA:L/SC:N/SI:N/SA:N'
cwe:
  - CWE-918
vendor: penpot
product: penpot
affected:
  - penpot < 2.18.0
published: '2026-10-05'
updated: '2026-10-05'
sourceUpdated: '2026-10-05T20:17:18.873'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-105689'
references:
  - url: >-
      https://github.com/penpot/penpot/commit/326d83e780ae120b45ccd6f3d7bd24922b54461c
    label: security-advisories@github.com
  - url: 'https://github.com/penpot/penpot/releases/tag/2.18.0'
    label: security-advisories@github.com
  - url: 'https://github.com/penpot/penpot/security/advisories/GHSA-wxgm-8qjw-x445'
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
cvssSource: cna
ingestedAt: '2026-10-05T20:32:56.651Z'
---

## Overview

Penpot is an open-source design and prototyping platform. Prior to 2.18.0, app.util.ssrf/blocked-address? relies on Java InetAddress predicates that do not classify NAT64, 6to4, or Teredo addresses and applies additional CIDR checks only to IPv4 values. Exploitation requires routing through a NAT64 gateway or an attacker-controlled DNS AAAA record; cloud environments with NAT64 gateways are directly exploitable. A user controlling a media import URL, or an administrator controlling a webhook URL, can then supply an IPv6 transition address that embeds a cloud-metadata, loopback, link-local, or private IPv4 target and bypasses the intended SSRF restrictions. Media import can disclose response bodies, while webhook delivery can expose response status as a network-probing side channel. This issue is fixed in version 2.18.0.

## Remediation

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