TI-2026-24832 Aliases CVE-2026-32303

Cryptomator: Tampered vault configuration allows MITM attack on Hub API

LOW 32CWE-346Published 2026-03-20 · Updated 2026-03-23

Key facts

Attack vector: Network
Privileges required: Low
User interaction: Required
Attack complexity: Low
Impact type: Security bypass, Spoofing
Confidentiality · integrity · availability: High · Low · None
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-346 and CWE-451.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00115 1st percentileScored 2026-11-07

Fix Fixed cryptomator (cryptomator): 1.19.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
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

Vendor	Product	Affected versions	Fixed in	Status	Source
cryptomator	cryptomator	before 1.19.1	1.19.1	Patch available	CNA

cryptomator Vendorcryptomator Affected before 1.19.1 Fixed in 1.19.1 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:cryptomator:cryptomator::::::::	before 1.19.1	Vulnerable	cryptomator

cpe:2.3:a:cryptomator:cryptomator:*:*:*:*:*:*:*:* Versions before 1.19.1 Vulnerable ·cryptomator

Remediation

Fix · CNA cryptomator (cryptomator) Fixed in 1.19.1

Timeline

2026-10-02 Threatist record created from CVE-2026-32303

References

Patch 1

https://github.com/cryptomator/cryptomator/commit/6b82abcd80449a30b561d823193f9ecea542a625

Advisory 1

https://github.com/cryptomator/cryptomator/security/advisories/GHSA-34rf-rwr3-7g43

Other 2

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-2026-25868 Cryptomator Hub OAuth token exchange HTTP downgrade via getAuthority() scheme confusion (CVE-2026-32303 bypass) CVSS 3.1MEDIUM 4.8
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

See all 9 →

Sources

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