CVE-2026-111664
Safing Portmaster before 2.2.5 Unauthenticated Forced Downgrade via /api/v1/updates/from-url
CVSS Score
4.4
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-306 |
| Vendor | safing |
| Product | portmaster |
| Published | Oct 16, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
Low
Affected Versions
safing / portmaster
0 < 2.2.5
References
github.com: https://github.com/safing/portmaster/issues/2292 github.com: https://github.com/safing/portmaster/blob/v2.2.3/service/core/api.go#L145-L159 github.com: https://github.com/safing/portmaster/commit/f943e1eaf98f45bc48490bf288e1d63c04929ae0 github.com: https://github.com/safing/portmaster/releases/tag/v2.2.5 vulncheck.com: https://www.vulncheck.com/advisories/safing-portmaster-before-2.2.5-unauthenticated-forced-downgrade-via-api-v1-updates-from-url
Credits
George Chen