Improper restriction of communication channel to intended endpoints in Cryptomator - CVE-2026-32303
Published: April 20, 2026
Vulnerability identifier: #VU126588
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-32303
CWE-ID: CWE-923
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: cryptomator
Affected software:
Cryptomator
Cryptomator
Detailed vulnerability description
The vulnerability allows a remote user to disclose sensitive information.
The vulnerability exists due to improper restriction of communication channel to intended endpoints in the Hub key loading mechanism when processing a tampered vault configuration file during unlock. A remote user can alter the vault.cryptomator file to disclose sensitive information.
User interaction is required to unlock a Hub-backed vault, and vault data was not exposed because Cryptomator Hub uses end-to-end encryption.
How to mitigate CVE-2026-32303
Install security update from vendor's website.