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Vulnerability record · CVE-2026-32318 · published 20 March 2026

CVE-2026-32318: Cryptomator origin validation error vulnerability

Cryptomator · Cryptomator

Cryptomator for IOS offers multi-platform transparent client-side encryption for files in the cloud. Prior to version 2.8.3, an integrity check vulnerability allows an attacker 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 2.8.3.

5.9 CVSS 3.1 Medium EPSS 0.11% · top 98.9% CWE-346 · Origin validation errorCWE-354 · CWE-354 Undergoing Analysis
5.9CVSS 3.1 base score
0.11%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

Cryptomator for IOS offers multi-platform transparent client-side encryption for files in the cloud. Prior to version 2.8.3, an integrity check vulnerability allows an attacker 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 2.8.3.

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/cryptomator/ios/commit/98c31280304af65c0932eb547d5fe4be2d16929c Patch
https://github.com/cryptomator/ios/pull/444 Issue Tracking
https://github.com/cryptomator/ios/releases/tag/2.8.3 Release Notes
https://github.com/cryptomator/ios/security/advisories/GHSA-g7fr-c82r-hm6j Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-32318), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.