CVE-2026-47122

Local UI spoofing via unvalidated XPC connections

Published Jul 21, 2026 · Updated Jul 21, 2026

UI spoofing in Sparkle 2.9.1 and earlier allows local users to inject forged appcast metadata through the AppInstaller XPC service. AppInstaller's shouldAcceptNewConnection: stops validating code signatures after stage 1, allowing any local process to submit an SUAppcastItem. Exploitation requires terminating the updating app within a tight race window; the result is forged release-note metadata, not modification of installed code.

CVSS severity4.2
Medium
EPSS probability0.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

UI spoofing in Sparkle 2.9.1 and earlier allows local users to inject forged appcast metadata through the AppInstaller XPC service. AppInstaller's shouldAcceptNewConnection: stops validating code signatures after stage 1, allowing any local process to submit an SUAppcastItem. Exploitation requires terminating the updating app within a tight race window; the result is forged release-note metadata, not modification of installed code.

The record

CVE
CVE-2026-47122
Published
Jul 21, 2026
Updated
Jul 21, 2026
Vendor
Sparkle Project
Product
Sparkle
Classifications
CWE-306, CWE-441, T1559.003
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 21, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=<= 2.9.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Sparkle Project · Sparkleversion=<= 2.9.1

Published CVSS scores

4.2GitHub, Inc.CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
CWE-441Unintended Proxy or Intermediary ('Confused Deputy')
T1559.003Inter-Process Communication: XPC Services

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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