CVE-2026-47122 Sparkle's AppInstaller post-stage-1 XPC listener accepts unvalidated connections, allowing spoofed appcast item data injection
Local attackers can inject spoofed appcast data into Sparkle's update process by connecting to an unvalidated XPC listener after stage 1 installation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-47122?
CVE-2026-47122 is a medium-severity missing authorization vulnerability in sparkle-project Sparkle, published on 21 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-47122?
2 open source packages ship an affected version, including github.com/sparkle-project/Sparkle. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/sparkle-project/Sparkle SwiftURL | All versions to 2.9.1 | None |
github.com/sparkle-project/Sparkle SwiftURL | All versions to 2.9.1 | None |
Products include Sparkle-Project Sparkle.
How do I fix CVE-2026-47122?
No fix has been published for CVE-2026-47122 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-47122 being exploited?
There is no known exploitation of CVE-2026-47122 in the wild and no public exploit code.
Other vulnerabilities in sparkle-project Sparkle
Sources
Also known as GHSA-g3hp-f6mg-559v.