Cryptomator encrypts data being stored on cloud infrastructure. Prior to version 1.19.1, an integrity check vulnerability allows an attacker to 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 1.19.1.
History

Tue, 24 Mar 2026 02:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 23 Mar 2026 10:00:00 +0000

Type Values Removed Values Added
First Time appeared Cryptomator
Cryptomator cryptomator
Vendors & Products Cryptomator
Cryptomator cryptomator

Fri, 20 Mar 2026 18:15:00 +0000

Type Values Removed Values Added
Description Cryptomator encrypts data being stored on cloud infrastructure. Prior to version 1.19.1, an integrity check vulnerability allows an attacker to 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 1.19.1.
Title Cryptomator: Tampered vault configuration allows MITM attack on Hub API
Weaknesses CWE-346
CWE-354
CWE-451
CWE-923
References
Metrics cvssV3_1

{'score': 7.6, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-03-20T17:57:31.884Z

Updated: 2026-03-23T21:41:57.420Z

Reserved: 2026-03-11T21:16:21.659Z

Link: CVE-2026-32303

cve-icon Vulnrichment

Updated: 2026-03-23T21:32:00.491Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-03-20T18:16:14.593

Modified: 2026-03-24T15:54:09.400

Link: CVE-2026-32303

cve-icon Redhat

No data.