---
id: "CVE-2026-111664"
kind: "vulnerability"
aliases: ["CVE-2026-111664"]
title: "Safing Portmaster: unprivileged local processes can force installs of older releases"
severity: "medium"
cvss: 4.8
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["desktop", "endpoint", "package", "portmaster"]
not_affected_if: ["portmaster-2.2.5-or-later"]
published_at: "2026-10-16T18:17:48+00:00"
first_seen_at: "2026-10-23T21:57:13+00:00"
updated_at: "2026-10-25T04:33:36+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-111664", "first_seen_at": "2026-10-23T21:57:13+00:00"}]
---

# Safing Portmaster: unprivileged local processes can force installs of older releases

Portmaster before 2.2.5 exposes POST /api/v1/updates/from-url to any local process without authorization. An attacker can point it at an index they control and install older Safing-signed releases that contain already-fixed vulnerabilities.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed Portmaster version against `2.2.5`; anything earlier is affected.
- unknown

## Fix

- Upgrade Portmaster to `2.2.5` or later.

## Timeline

- 2026-10-23T21:57:13+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-111664

## From the sources

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.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_