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CVE-2026-47122— Sparkle's AppInstaller post-stage-1 XPC listener accepts unvalidated connections, allowing spoofed appcast item data injection

Quick assessment

Affected
sparkle-project Sparkle
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.

sparkle-project sparkle是sparkle-project团队开源的一个软件更新框架。 sparkle-project sparkle 2.9.1及之前版本存在安全漏洞，该漏洞源于第一阶段完成后，对注册的Mach服务连接未进行团队ID或代码签名检查，可能导致本地进程绕过授权。

CVSS 4.2 · Medium EPSS 0.10% · P1

Affected Version Matrix 1

VendorProduct Version RangeStatus
sparkle-project Sparkle <= 2.9.1 affected
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I. Basic Information for CVE-2026-47122

Vulnerability Information
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Vulnerability Title
Sparkle's AppInstaller post-stage-1 XPC listener accepts unvalidated connections, allowing spoofed appcast item data injection
Source: CVE Program / CVE List V5
Vulnerability Description
Sparkle is a software update framework for macOS. In versions up to and including 2.9.1, `Autoupdate/AppInstaller.m`'s `shouldAcceptNewConnection:` only enforces `SUCodeSigningVerifier validateConnection:` before stage 1 completes. After `_performedStage1Installation = YES`, new connections to the registered Mach service `<bundleId>-spki` are accepted from any local process without team-ID or code-signing checks. As of time of publication, no known patched versions are available.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/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
Vulnerability Title
sparkle-project sparkle 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
sparkle-project sparkle是sparkle-project团队开源的一个软件更新框架。 sparkle-project sparkle 2.9.1及之前版本存在安全漏洞，该漏洞源于第一阶段完成后，对注册的Mach服务连接未进行团队ID或代码签名检查，可能导致本地进程绕过授权。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
sparkle-project Sparkle <= 2.9.1 -

II. Public POCs for CVE-2026-47122

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III. Intelligence Information for CVE-2026-47122

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Vendor Advisories for CVE-2026-47122 (1)

IV. Related Vulnerabilities

Same product: Sparkle
Same vendor: sparkle-project
Same weakness: CWE-306

V. Comments for CVE-2026-47122

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