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TI-2026-25868 Aliases CVE-2026-33472

Cryptomator Hub OAuth token exchange HTTP downgrade via getAuthority() scheme confusion (CVE-2026-32303 bypass)

Priority MEDIUM 55CWE-305Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Required
Attack complexity
High
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-319.

Summary

Cryptomator is an open-source client-side encryption application for cloud storage. Version 1.19.1 contains a logic flaw in CheckHostTrustController.getAuthority() that allows an attacker to bypass the security fix for CVE-2026-32303. The method hardcodes the URI scheme based on port number, causing HTTPS URLs with port 80 to produce the same authority string as HTTP URLs, which defeats both the consistency check and the HTTP block validation. An attacker with write access to a cloud-synced vault.cryptomator file can craft a Hub configuration where apiBaseUrl and authEndpoint use HTTPS with port 80 to pass auto-trust validation, while tokenEndpoint uses plaintext HTTP. The vault is auto-trusted without user prompt, and a network-positioned attacker can intercept the OAuth token exchange to access the Cryptomator Hub API as the victim. This issue has been fixed in version 1.19.2.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00106 1st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed cryptomator (cryptomator): 1.19.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
cryptomatorcryptomator1.19.1 to before 1.19.21.19.2Patch availableCNA
  • cryptomator Vendorcryptomator Affected 1.19.1 to before 1.19.2 Fixed in 1.19.2 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:cryptomator:cryptomator:*:*:*:*:*:*:*:*before 1.19.2Vulnerablecryptomator
  • cpe:2.3:a:cryptomator:cryptomator:*:*:*:*:*:*:*:* Versions before 1.19.2 Vulnerable ·cryptomator

Remediation

  • Fix · CNA cryptomator (cryptomator) Fixed in 1.19.2

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-33472

References

Exploit 1

Patch 1

Other 1

  • TI-2023-19340 Cryptomator's MSI installer allows local privilege escalation CVSS 3.1HIGH 7.8
  • TI-2023-20652 Cryptomator vulnerable to Local Elevation of Privileges CVSS 3.1HIGH 7.8
  • TI-2026-24838 Cryptomator: Unverified masterkeyfile key IDs can access arbitrary local or UNC paths CVSS 3.1MEDIUM 5.3
  • TI-2026-24837 Cryptomator: Hub unlocking accepts plaintext HTTP and unvalidated endpoint schemes CVSS 4.0HIGH 8.7
  • TI-2022-09052 Cryptomator through 1.6.5 allows DYLIB injection because, although it has the flag 0x1000… CVSS 3.1HIGH 7.8
  • TI-2026-24846 Cryptomator for IOS: Tampered vault configuration allows MITM attack on Hub API CVSS 3.1HIGH 7.6
See all 9 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences