Vulnerability in Cryptomator
CVE-2026-32309
Cryptomator encrypts data being stored on cloud infrastructure. Prior to version 1.19.1, the Hub-based unlock flow explicitly supports hub+http and consumes Hub endpoints from vault metadata without enforcing HTTPS. As a result, a vault configuration can drive OAuth and key-loading traffic over plaintext HTTP or other insecure endpoint combinations. An active network attacker can tamper with or observe this traffic. Even when the vault key is encrypted for the device, bearer tokens and endpoint-level trust decisions are still exposed to downgrade and interception. This issue has been patched in version 1.19.1.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.003 (17.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 17th percentile — 17.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
- Cryptomator — versions < 1.19.1
Weakness classification (CWE)
References
- github.com/cryptomator/cryptomator/security/advisories/GHSA-vv33-h7qx-c264 (Vendor Advisory)
- github.com/cryptomator/cryptomator/releases/tag/1.19.1 (Release Notes)
Frequently asked questions
- What is CVE-2026-32309?
- CVE-2026-32309 is a high-severity vulnerability in Cryptomator, classified under Cleartext Transmission of Sensitive Information. CVSS score: 7.5/10. Published 2026-03-20.
- How severe is CVE-2026-32309?
- High severity. CVSS v3 base score is 7.5 out of 10.