capacitor-updater - End-to-End Encryption Bypass via Private Key Distribution
In @capgo/capacitor-updater (Cap-go/capgo) before 12.128.2, the end-to-end encryption scheme distributes the private key to each device that downloads the app. Because the public key can be derived from the private key, an attacker performing a man-in-the-middle attack or compromising the Capgo server can create a validly signed update bundle and cause devices to install an update not produced by the original app maker.
CVE-2026-56254
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-56254
capacitor-updater
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "capacitor-updater",
"product": "capacitor-updater",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "12.128.2",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "12.128.2",
"versionType": "semver"
}
],
"packageURL": "pkg:npm/%40capgo/capacitor-updater",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-56254
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #12757 · Revision 1
- Added to Heist Feed
- Publisher date