CVE-2026-47122

MEDIUM4.2

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

Published Jul 21, 2026

Modified 1 months ago

Details

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.

References

WEB

https://github.com/sparkle-project/Sparkle/security/advisories/GHSA-g3hp-f6mg-559v

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2026-47122

CVSS Analysis

CVSS v3.1

4.2

Exploitability

Attack Vector

LocalAV:L

Attack Complexity