CVE-2026-33472

Cryptomator is an open-source client-side encryption application for cloud storage. Version 1.19.1 contains a logic flaw in CheckHostTrustController.getAuthority() that allows an attacker to bypass the security fix for CVE-2026-32303. The method hardcodes the URI scheme based on port number, causing HTTPS URLs with port 80 to produce the same authority string as HTTP URLs, which defeats both the consistency check and the HTTP block validation. An attacker with write access to a cloud-synced vault.cryptomator file can craft a Hub configuration where apiBaseUrl and authEndpoint use HTTPS with port 80 to pass auto-trust validation, while tokenEndpoint uses plaintext HTTP. The vault is auto-trusted without user prompt, and a network-positioned attacker can intercept the OAuth token exchange to access the Cryptomator Hub API as the victim. This issue has been fixed in version 1.19.2.

• CWE-305
• CWE-319

• https://github.com/cryptomator/cryptomator/pull/4179Issue Tracking, Patch
• https://github.com/cryptomator/cryptomator/releases/tag/1.19.2Product, Release Notes
• https://github.com/cryptomator/cryptomator/security/advisories/GHSA-9q8x-whrw-x44pExploit, Vendor Advisory
• https://github.com/cryptomator/cryptomator/security/advisories/GHSA-9q8x-whrw-x44pExploit, Vendor Advisory

Published

Apr 16, 2026

Last Modified

Jun 17, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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