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CVE-2026-47122

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

Published: Jul 21, 2026Updated: Aug 5, 2026 Sources: CVE List NVDCWE-306
4.2MEDIUM
NVD MITRE
EPSS Score
0.1%
Top 99.9%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:LAC:HPR:LUI:NS:CC:NI:LA:L
Exploitability
AV:LAttack Vector
Local
AC:HAttack Complexity
High
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:NConfidentiality
None
I:LIntegrity
Low
A:LAvailability
Low
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Weaknesses

CWE-306CWE-441

Affected Products

sparkle-project
oss-projectaka sparkle
SparkleMixed
Web & CMS Plugins / cms-core
and 1 more affected products View all →

Exploitability

Official Patch Available

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Initial Access
View detailed technique mapping

References

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

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