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Vulnerability Details :

CVE-2026-32303

Summary
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
Published At-20 Mar, 2026 | 17:57
Updated At-23 Mar, 2026 | 21:41
Rejected At-
Credits

Cryptomator: Tampered vault configuration allows MITM attack on Hub API

Cryptomator encrypts data being stored on cloud infrastructure. Prior to version 1.19.1, an integrity check vulnerability allows an attacker to 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 1.19.1.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:GitHub_M
Assigner Org ID:a0819718-46f1-4df5-94e2-005712e83aaa
Published At:20 Mar, 2026 | 17:57
Updated At:23 Mar, 2026 | 21:41
Rejected At:
▼CVE Numbering Authority (CNA)
Cryptomator: Tampered vault configuration allows MITM attack on Hub API

Cryptomator encrypts data being stored on cloud infrastructure. Prior to version 1.19.1, an integrity check vulnerability allows an attacker to 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 1.19.1.

Affected Products
Vendor
cryptomator
Product
cryptomator
Versions
Affected
  • < 1.19.1
Problem Types
TypeCWE IDDescription
CWECWE-346CWE-346: Origin Validation Error
CWECWE-354CWE-354: Improper Validation of Integrity Check Value
CWECWE-451CWE-451: User Interface (UI) Misrepresentation of Critical Information
CWECWE-923CWE-923: Improper Restriction of Communication Channel to Intended Endpoints
Type: CWE
CWE ID: CWE-346
Description: CWE-346: Origin Validation Error
Type: CWE
CWE ID: CWE-354
Description: CWE-354: Improper Validation of Integrity Check Value
Type: CWE
CWE ID: CWE-451
Description: CWE-451: User Interface (UI) Misrepresentation of Critical Information
Type: CWE
CWE ID: CWE-923
Description: CWE-923: Improper Restriction of Communication Channel to Intended Endpoints
Metrics
VersionBase scoreBase severityVector
3.17.6HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N
Version: 3.1
Base score: 7.6
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://github.com/cryptomator/cryptomator/security/advisories/GHSA-34rf-rwr3-7g43
x_refsource_CONFIRM
https://github.com/cryptomator/cryptomator/pull/4179
x_refsource_MISC
https://github.com/cryptomator/cryptomator/commit/6b82abcd80449a30b561d823193f9ecea542a625
x_refsource_MISC
https://github.com/cryptomator/cryptomator/releases/tag/1.19.1
x_refsource_MISC
Hyperlink: https://github.com/cryptomator/cryptomator/security/advisories/GHSA-34rf-rwr3-7g43
Resource:
x_refsource_CONFIRM
Hyperlink: https://github.com/cryptomator/cryptomator/pull/4179
Resource:
x_refsource_MISC
Hyperlink: https://github.com/cryptomator/cryptomator/commit/6b82abcd80449a30b561d823193f9ecea542a625
Resource:
x_refsource_MISC
Hyperlink: https://github.com/cryptomator/cryptomator/releases/tag/1.19.1
Resource:
x_refsource_MISC
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security-advisories@github.com
Published At:20 Mar, 2026 | 18:16
Updated At:26 Mar, 2026 | 13:55

Cryptomator encrypts data being stored on cloud infrastructure. Prior to version 1.19.1, an integrity check vulnerability allows an attacker to 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 1.19.1.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.17.6HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N
Primary3.15.9MEDIUM
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N
Type: Secondary
Version: 3.1
Base score: 7.6
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N
Type: Primary
Version: 3.1
Base score: 5.9
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N
CPE Matches

cryptomator
cryptomator
>>cryptomator>>Versions before 1.19.1(exclusive)
cpe:2.3:a:cryptomator:cryptomator:*:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-346Primarysecurity-advisories@github.com
CWE-354Primarysecurity-advisories@github.com
CWE-451Primarysecurity-advisories@github.com
CWE-923Primarysecurity-advisories@github.com
CWE ID: CWE-346
Type: Primary
Source: security-advisories@github.com
CWE ID: CWE-354
Type: Primary
Source: security-advisories@github.com
CWE ID: CWE-451
Type: Primary
Source: security-advisories@github.com
CWE ID: CWE-923
Type: Primary
Source: security-advisories@github.com
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://github.com/cryptomator/cryptomator/commit/6b82abcd80449a30b561d823193f9ecea542a625security-advisories@github.com
Patch
https://github.com/cryptomator/cryptomator/pull/4179security-advisories@github.com
Issue Tracking
https://github.com/cryptomator/cryptomator/releases/tag/1.19.1security-advisories@github.com
Release Notes
https://github.com/cryptomator/cryptomator/security/advisories/GHSA-34rf-rwr3-7g43security-advisories@github.com
Vendor Advisory
Hyperlink: https://github.com/cryptomator/cryptomator/commit/6b82abcd80449a30b561d823193f9ecea542a625
Source: security-advisories@github.com
Resource:
Patch
Hyperlink: https://github.com/cryptomator/cryptomator/pull/4179
Source: security-advisories@github.com
Resource:
Issue Tracking
Hyperlink: https://github.com/cryptomator/cryptomator/releases/tag/1.19.1
Source: security-advisories@github.com
Resource:
Release Notes
Hyperlink: https://github.com/cryptomator/cryptomator/security/advisories/GHSA-34rf-rwr3-7g43
Source: security-advisories@github.com
Resource:
Vendor Advisory

Change History

0
Information is not available yet

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Action-Not Available
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Published-20 Mar, 2026 | 18:29
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Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
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Action-Not Available
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Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
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Details not found