CVE-2026-32309Network attack vector

Hub token interception via unvalidated endpoint schemes

Published Mar 20, 2026 · Updated Mar 20, 2026

Cleartext transmission in Cryptomator before 1.19.1 allows man-in-the-middle attackers to intercept Hub unlock traffic. HubKeyLoadingStrategy accepts hub+http, while AuthFlowTask and HubConfig create and use authentication, token, and API URIs from vault metadata without requiring HTTPS or a consistent trusted origin. Exploitation requires a Hub-backed vault with attacker-controlled endpoint metadata and a network position on the resulting connection; exposed bearer tokens permit Hub API impersonation, while altered responses can affect device registration and key delivery.

CVSS severity8.7
High
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cleartext transmission in Cryptomator before 1.19.1 allows man-in-the-middle attackers to intercept Hub unlock traffic. HubKeyLoadingStrategy accepts hub+http, while AuthFlowTask and HubConfig create and use authentication, token, and API URIs from vault metadata without requiring HTTPS or a consistent trusted origin. Exploitation requires a Hub-backed vault with attacker-controlled endpoint metadata and a network position on the resulting connection; exposed bearer tokens permit Hub API impersonation, while altered responses can affect device registration and key delivery.

The record

CVE
CVE-2026-32309
Published
Mar 20, 2026
Updated
Mar 20, 2026
Vendor
Cryptomator
Product
Cryptomator
Classifications
CWE-319, T1557
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 20, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.19.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Cryptomator · Cryptomatorversion=< 1.19.1

Published CVSS scores

8.7GitHub, Inc.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
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-319Cleartext Transmission of Sensitive Information
T1557Adversary-in-the-Middle

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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