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

Quick assessment

Affected
safing portmaster
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Safing Portmaster 2.2.5 之前的版本存在一个缺少授权验证的漏洞，允许非特权本地进程通过调用已注册为 的 端点来强制更新。攻击者可以提供一个由自己控制的索引 URL，从而绕过版本检查和自动应用设置，安装携带先前已修复漏洞的旧版 Safing 签名版本。

CVSS 4.4 · Medium EPSS 0.12% · P2

Affected Version Matrix 1

VendorProduct Version RangeStatus
safing portmaster < 2.2.5 affected
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I. Basic Information for CVE-2026-111664

Vulnerability Information
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Vulnerability Title
Safing Portmaster before 2.2.5 Unauthenticated Forced Downgrade via /api/v1/updates/from-url
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
safing portmaster 0 ~ 2.2.5 -

II. Public POCs for CVE-2026-111664

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-111664

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Patches & Fixes for CVE-2026-111664 (1)

Vendor Advisories for CVE-2026-111664 (1)

Other References for CVE-2026-111664 (2)

IV. Related Vulnerabilities

Same weakness: CWE-306

V. Comments for CVE-2026-111664

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