---
id: CVE-2026-111664
title: >-
  Safing Portmaster before 2.2.5 Unauthenticated Forced Downgrade via
  /api/v1/updates/from-url
summary: >-
  Safing Portmaster before 2.2.5 contains a missing authorization vulnerability
  that allows unprivileged local processes to force updates by calling the POST
  /api/v1/updates/from-url endpoint registered with api.PermitAnyone. Attackers
  can…
severity: medium
cvss: 4.4
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L'
cvssSource: cna
cwe:
  - CWE-306
vendor: safing
product: portmaster
affected:
  - portmaster < 2.2.5
published: '2026-10-16'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T17:39:27.588Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-111664'
references:
  - url: 'https://github.com/safing/portmaster/issues/2292'
  - url: >-
      https://github.com/safing/portmaster/blob/v2.2.3/service/core/api.go#L145-L159
  - url: >-
      https://github.com/safing/portmaster/commit/f943e1eaf98f45bc48490bf288e1d63c04929ae0
  - url: 'https://github.com/safing/portmaster/releases/tag/v2.2.5'
    label: portmaster v2.2.5 Release Notes
  - url: >-
      https://www.vulncheck.com/advisories/safing-portmaster-before-2.2.5-unauthenticated-forced-downgrade-via-api-v1-updates-from-url
    label: >-
      VulnCheck Advisory: Safing Portmaster before 2.2.5 Unauthenticated Forced
      Downgrade via /api/v1/updates/from-url
tags:
  - cve.org
ingestedAt: '2026-10-16T18:43:08.670Z'
---

## Overview

Safing Portmaster before 2.2.5 contains a missing authorization vulnerability that allows unprivileged local processes to force updates by calling the POST /api/v1/updates/from-url endpoint registered with api.PermitAnyone. Attackers can supply an attacker-controlled index URL that bypasses version checks and auto-apply settings, installing older Safing-signed releases carrying previously fixed vulnerabilities.

## Affected

- `portmaster < 2.2.5`

## Remediation

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