7.6

CVE-2026-32303

Cryptomator: Tampered vault configuration allows MITM attack on Hub API

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
CryptomatorCryptomator Version < 1.19.1
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.11% 0.015
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 5.9 1.6 4.2
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N
security-advisories@github.com 7.6 2.3 4.7
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N
CWE-346 Origin Validation Error

The product does not properly verify that the source of data or communication is valid.

CWE-354 Improper Validation of Integrity Check Value

The product does not validate or incorrectly validates the integrity check values or "checksums" of a message. This may prevent it from detecting if the data has been modified or corrupted in transmission.

CWE-451 User Interface (UI) Misrepresentation of Critical Information

The user interface (UI) does not properly represent critical information to the user, allowing the information - or its source - to be obscured or spoofed. This is often a component in phishing attacks.

CWE-923 Improper Restriction of Communication Channel to Intended Endpoints

The product establishes a communication channel to (or from) an endpoint for privileged or protected operations, but it does not properly ensure that it is communicating with the correct endpoint.

https://github.com/cryptomator/cryptomator/commit/6b82abcd80449a30b561d823193f9ecea542a625
Patch
https://github.com/cryptomator/cryptomator/pull/4179
Issue Tracking
https://github.com/cryptomator/cryptomator/releases/tag/1.19.1
Release Notes
https://github.com/cryptomator/cryptomator/security/advisories/GHSA-34rf-rwr3-7g43
Vendor Advisory