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.

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.

EPSS: 0.002 (10.7th percentile) — read the EPSS interpretation.

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.

Affected products

Cryptomator — versions < 1.19.1

Weakness classification (CWE)

CWE-319 — Cleartext Transmission of Sensitive Information

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
security-advisories@github.com (x_refsource_MISC, 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.