How severe is CVE-2026-32303?

CVE-2026-32303 has a CVSS 3.x base score of 7.6, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity low, and availability none.

Is CVE-2026-32303 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-32303?

CVE-2026-32303 affects Cryptomator. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-32303?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-32303 have an EU (EUVD) identifier?

Yes. CVE-2026-32303 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-13746.

When was CVE-2026-32303 published?

CVE-2026-32303 was published on 2026-03-20 and last updated on 2026-06-17.

CVE-2026-32303

CVE-2026-32303 is a high-severity vulnerability in Cryptomator with a CVSS 3.x base score of 7.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-346.

Key facts

Severity: High (CVSS 3.x base score 7.6)
EPSS exploit prediction: 0% (2nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-13746
Weakness: CWE-346
Affected product: Cryptomator
Published: 2026-03-20
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2026-32303?: 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.
How severe is CVE-2026-32303?: CVE-2026-32303 has a CVSS 3.x base score of 7.6, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity low, and availability none.
Is CVE-2026-32303 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-32303?: CVE-2026-32303 affects Cryptomator. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-32303?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-32303 have an EU (EUVD) identifier?: Yes. CVE-2026-32303 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-13746.
When was CVE-2026-32303 published?: CVE-2026-32303 was published on 2026-03-20 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:cryptomator:cryptomator:*:*:*:*:*:*:*:*

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