Auth bypass in Sparkle-Project Sparkle
CVE-2026-47122
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.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.2 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:L.
EPSS exploit prediction
EPSS: 0.001 (1.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 1st percentile — 1.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000
Affected products
- Sparkle-Project Sparkle — versions <= 2.9.1
Weakness classification (CWE)
References
- github.com/sparkle-project/Sparkle/security/advisories/GHSA-g3hp-f6mg-559v (Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-47122?
- CVE-2026-47122 is a medium-severity vulnerability in Sparkle-Project Sparkle, classified under Missing Authentication for Critical Function. CVSS score: 4.2/10. Published 2026-07-21.
- How severe is CVE-2026-47122?
- Medium severity. CVSS v3 base score is 4.2 out of 10.