CVE-2026-111664

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.

CVSS 4.0

4.8CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N

CVSS 3.1

4.4CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

EPSS

0.1% chance of exploitation in the next 30 days; higher than 1% of CVEs (scores of 2026-10-25)

CWE

CWE-306

Published

2026-10-16

Modified

2026-10-21

Record from

the NVD, synced 2026-10-22

References

• 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/issues/2292
• 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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