CVE-2026-111664 Safing Portmaster before 2.2.5 Unauthenticated Forced Downgrade via /api/v1/updates/from-url
Unprivileged local processes can force Portmaster to install vulnerable older versions via an unauthenticated API endpoint, bypassing security controls.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-111664?
CVE-2026-111664 is a medium-severity missing authorization vulnerability in safing portmaster, published on 16 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-306
Which versions are affected by CVE-2026-111664?
How do I fix CVE-2026-111664?
No fix has been published for CVE-2026-111664 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-111664 being exploited?
There is no known exploitation of CVE-2026-111664 in the wild and no public exploit code.
Sources
Also known as GHSA-6952-c35h-6rff.