CVE-2026-32317

Cryptomator for Android: Tampered vault configuration allows MITM attack on Hub API

Severity Score

7.6

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track

*SSVC

Descriptions

Cryptomator for Android offers multi-platform transparent client-side encryption for files in the cloud. Prior to version 1.12.3, an integrity check vulnerability allows an attacker tamper with the vault configuration file leading to a man-in-the-middle vulnerability in Hub key loading mechanism. Before this fix, the client trusted endpoints from the vault config without host authenticity checks, which could allow token exfiltration by mixing a legitimate auth endpoint with a malicious API endpoint. Impacted are users unlocking Hub-backed vaults with affected client versions in environments where an attacker can alter the vault.cryptomator file. This issue has been patched in version 1.12.3.

Cryptomator para Android ofrece cifrado del lado del cliente transparente multiplataforma para archivos en la nube. Antes de la versión 1.12.3, una vulnerabilidad de verificación de integridad permite a un atacante manipular el archivo de configuración de la bóveda, lo que lleva a una vulnerabilidad man-in-the-middle en el mecanismo de carga de claves de Hub. Antes de esta corrección, el cliente confiaba en los puntos finales de la configuración de la bóveda sin comprobaciones de autenticidad del host, lo que podría permitir la exfiltración de tokens al mezclar un punto final de autenticación legítimo con un punto final de API malicioso. Los usuarios afectados son aquellos que desbloquean bóvedas respaldadas por Hub con versiones de cliente afectadas en entornos donde un atacante puede alterar el archivo vault.cryptomator. Este problema ha sido parcheado en la versión 1.12.3.

*Credits: N/A

CVSS Scores

GitHubv3.1 7.6

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

High

Integrity

Low

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2026-03-11 CVE Reserved
2026-03-20 CVE Published
2026-03-24 CVE Updated
2026-04-21 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-346: Origin Validation Error
CWE-354: Improper Validation of Integrity Check Value
CWE-451: User Interface (UI) Misrepresentation of Critical Information
CWE-923: Improper Restriction of Communication Channel to Intended Endpoints

CAPEC

References (2)

URL	Tag	Source
https://github.com/cryptomator/android/releases/tag/1.12.3	X_refsource_misc
https://github.com/cryptomator/android/security/advisories/GHSA-876q-q3mm-fcvj	X_refsource_confirm

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Cryptomator Search vendor "Cryptomator"		Android Search vendor "Cryptomator" for product "Android"				< 1.12.3 Search vendor "Cryptomator" for product "Android" and version " < 1.12.3"		en		Affected