Vulnerability in Cryptomator
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.001 (2.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 3rd percentile — 2.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: +0.000
Affected products
- Cryptomator — versions >= 1.19.1, < 1.19.2
Weakness classification (CWE)
References
- github.com/cryptomator/cryptomator/security/advisories/GHSA-9q8x-whrw-x44p (Exploit, Vendor Advisory)
- github.com/cryptomator/cryptomator/pull/4179 (Patch, Issue Tracking)
- github.com/cryptomator/cryptomator/releases/tag/1.19.2 (Product, Release Notes)
Frequently asked questions
- What is CVE-2026-33472?
- CVE-2026-33472 is a medium-severity vulnerability in Cryptomator, classified under Authentication Bypass by Primary Weakness. CVSS score: 4.8/10. Published 2026-04-16.
- How severe is CVE-2026-33472?
- Medium severity. CVSS v3 base score is 4.8 out of 10.