CVE-2026-56254

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.

CVSS v3 7.0 HIGH

7.0^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.2 / Impact : 4.7

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact HIGH

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/Cap-go/capgo/security/advisories/GHSA-j2f4-4pfc-p8rx
https://www.vulncheck.com/advisories/capacitor-updater-end-to-end-encryption-bypass-via-private-key-distribution

Configurations

No configuration.

History

25 Oct 2026, 15:10

Type	Values Removed	Values Added
Summary		(es) En @capgo/capacitor-updater (Cap-go/capgo) antes de 12.128.2, el esquema de cifrado de extremo a extremo distribuye la clave privada a cada dispositivo que descarga la aplicación. Debido a que la clave pública puede derivarse de la clave privada, un atacante realizando un ataque man-in-the-middle o comprometiendo el servidor de Capgo puede crear un paquete de actualización válidamente firmado y hacer que los dispositivos instalen una actualización no producida por el creador original de la aplicación.

Information

Published : 2026-07-10 15:16

Updated : 2026-10-25 15:10

NVD link : CVE-2026-56254

Mitre link : CVE-2026-56254

CVE.ORG link : CVE-2026-56254

JSON object : View

Products Affected

No product.

CWE

CWE-320

Key Management Errors

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