CVE-2026-47122
MEDIUMSparkle's AppInstaller post-stage-1 XPC listener accepts unvalidated connections, allowing spoofed appcast item data injection
Title source: cnaDescription
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 (1)
Core 1
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/sparkle-project/Sparkle/security/advisories/GHSA-g3hp-f6mg-559v
Scores
CVSS v3
4.2
EPSS
0.0008
EPSS Percentile
0.2%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:L
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-306
CWE-441
Status
published
Products (1)
sparkle-project/Sparkle
<= 2.9.1
Published
Jul 21, 2026
Tracked Since
Jul 21, 2026