Forged updates via distributed private signing key
Published Jul 10, 2026 · Updated Jul 10, 2026
Key-management errors in Capacitor Updater before 12.128.2 allow remote attackers to install attacker-signed update bundles. The end-to-end update scheme places its private signing key on every device and accepts bundles signed with that exposed key as publisher-approved. Exploitation requires interception of the update channel or compromise of Capgo's server and results in installation of an update not produced by the app maker.
Summary
What happened
Key-management errors in Capacitor Updater before 12.128.2 allow remote attackers to install attacker-signed update bundles. The end-to-end update scheme places its private signing key on every device and accepts bundles signed with that exposed key as publisher-approved. Exploitation requires interception of the update channel or compromise of Capgo's server and results in installation of an update not produced by the app maker.
The record
- CVE
- CVE-2026-56254
- Published
- Jul 10, 2026
- Updated
- Jul 10, 2026
- Vendor
- Capgo
- Product
- Capacitor Updater
- Classifications
- CWE-320, T1195.002
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 10, 2026CVE publishedPublication date reported by the CVE source.
- Jul 10, 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.
- Affected versionversion=0 <12.128.2
What conditions does exploitation require?
What is affected?
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.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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