CVE-2026-33472 Details
Description
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.
A logic flaw in Cryptomator version 1.19.1 has been identified, allowing an attacker to bypass security measures and intercept OAuth tokens. This vulnerability arises from the 'CheckHostTrustController.getAuthority()' method, which incorrectly hardcodes the URI scheme based on port numbers. As a result, HTTPS URLs on port 80 are treated the same as HTTP URLs, undermining security checks. An attacker with write access to a cloud-synced 'vault.cryptomator' file can exploit this flaw by crafting a Hub configuration that uses HTTPS with port 80 for certain endpoints, while downgrading the token exchange to plaintext HTTP. This issue has been addressed in version 1.19.2.
Users can update to Cryptomator version 1.19.2, which includes the necessary fix for this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Apr 17, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/cryptomator/cryptomator/security/advisories/GHSA-9q8x-whrw-x44p | CISA-ADP | ExploitVendor Advisory |
| https://github.com/cryptomator/cryptomator/pull/4179 | [email protected] | Issue TrackingPatch |
| https://github.com/cryptomator/cryptomator/releases/tag/1.19.2 | [email protected] | ProductRelease Notes |
| https://github.com/cryptomator/cryptomator/security/advisories/GHSA-9q8x-whrw-x44p | [email protected] | ExploitVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-305 | Authentication Bypass by Primary Weakness | [email protected] |
| CWE-319 | Cleartext Transmission of Sensitive Information | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| cryptomator cryptomator | < 1.19.2 |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 22, 2026 | Initial Analysis | [email protected] |
| Apr 20, 2026 | CVE Modified | CISA-ADP |
| Apr 16, 2026 | New CVE Received | [email protected] |