medium4.2
CVE-2026-47122
Sparkle's AppInstaller post-stage-1 XPC listener accepts unvalidated connections, allowing spoofed appcast item data injection
Impact
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 packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| swift | github.com/sparkle-project/Sparkle | <= 2.9.1 | none recorded |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Sparkle-Project | Sparkle | through 2.9.1 |