CVE-2026-47122: Sparkle-Project Sparkle

Medium severity, CVSS 4.2. EPSS: 0.1% chance of exploitation in the next 30 days.

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.

Affected products

• Sparkle-Project Sparkle: up to and including 2.9.1

Published 2026-07-21. Last modified 2026-08-05.