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CVE-2026-32309— Cryptomator: Hub unlocking accepts plaintext HTTP and unvalidated endpoint schemes

Quick assessment

Affected
cryptomator cryptomator
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Cryptomator是Cryptomator社区的一个简单的数字自卫工具。 Cryptomator 1.19.1之前版本存在安全漏洞，该漏洞源于基于Hub的解锁流程未强制使用HTTPS，可能导致网络流量被篡改或观察。

AI Predicted 7.5 Difficulty: Easy EPSS 0.27% · P18

Possible ATT&CK Techniques 1 AI

T1557.002 · ARP Cache Poisoning
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I. Basic Information for CVE-2026-32309

Vulnerability Information
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Vulnerability Title
Cryptomator: Hub unlocking accepts plaintext HTTP and unvalidated endpoint schemes
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
敏感数据的明文传输
Source: CVE Program / CVE List V5
Vulnerability Title
Cryptomator 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cryptomator是Cryptomator社区的一个简单的数字自卫工具。 Cryptomator 1.19.1之前版本存在安全漏洞，该漏洞源于基于Hub的解锁流程未强制使用HTTPS，可能导致网络流量被篡改或观察。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
cryptomator cryptomator < 1.19.1 -

II. Public POCs for CVE-2026-32309

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III. Intelligence Information for CVE-2026-32309

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Vendor Advisories for CVE-2026-32309 (1)

Vendor Pages for CVE-2026-32309 (1)

Same Patch Batch · cryptomator · 2026-03-20 · 5 CVEs total

CVE-2026-32303 7.6 HIGH Cryptomator: Tampered vault configuration allows MITM attack on Hub API
CVE-2026-32318 7.6 HIGH Cryptomator for IOS: Tampered vault configuration allows MITM attack on Hub API
CVE-2026-32317 7.6 HIGH Cryptomator for Android: Tampered vault configuration allows MITM attack on Hub API
CVE-2026-32310 4.1 MEDIUM Cryptomator: Unverified masterkeyfile key IDs can access arbitrary local or UNC paths

IV. Related Vulnerabilities

Same product: cryptomator
Same vendor: cryptomator
Same weakness: CWE-319

V. Comments for CVE-2026-32309

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