CVE-2026-32303

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{"affected": [{"affectedData": [{"product": "cryptomator", "vendor": "cryptomator", "versions": [{"status": "affected", "version": "< 1.19.1"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:cryptomator:cryptomator:*:*:*:*:*:*:*:*", "matchCriteriaId": "039991F9-B02C-4F96-B022-2ACFD48A068C", "versionEndExcluding": "1.19.1", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "Cryptomator cifra datos almacenados en infraestructura en la nube. Antes de la versi\u00f3n 1.19.1, una vulnerabilidad de verificaci\u00f3n de integridad permite a un atacante manipular el archivo de configuraci\u00f3n de la b\u00f3veda, lo que lleva a una vulnerabilidad de man-in-the-middle en el mecanismo de carga de claves de Hub. Antes de esta correcci\u00f3n, el cliente confiaba en los puntos finales de la configuraci\u00f3n de la b\u00f3veda sin verificaciones de autenticidad del host, lo que podr\u00eda permitir la exfiltraci\u00f3n de tokens al mezclar un punto final de autenticaci\u00f3n leg\u00edtimo con un punto final de API malicioso. Los usuarios afectados son aquellos que desbloquean b\u00f3vedas respaldadas por Hub con versiones de cliente afectadas en entornos donde un atacante puede alterar el archivo vault.cryptomator. Este problema ha sido parcheado en la versi\u00f3n 1.19.1."}], "id": "CVE-2026-32303", "lastModified": "2026-06-17T10:35:31.807", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.6, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.3, "impactScore": 4.7, "source": "security-advisories@github.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 1.6, "impactScore": 4.2, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-32303", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-03-23T20:52:44.437617Z", "version": "2.0.3"}}]}, "published": "2026-03-20T18:16:14.593", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/cryptomator/cryptomator/commit/6b82abcd80449a30b561d823193f9ecea542a625"}, {"source": "security-advisories@github.com", "tags": ["Issue Tracking"], "url": "https://github.com/cryptomator/cryptomator/pull/4179"}, {"source": "security-advisories@github.com", "tags": ["Release Notes"], "url": "https://github.com/cryptomator/cryptomator/releases/tag/1.19.1"}, {"source": "security-advisories@github.com", "tags": ["Vendor Advisory"], "url": "https://github.com/cryptomator/cryptomator/security/advisories/GHSA-34rf-rwr3-7g43"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-346"}, {"lang": "en", "value": "CWE-354"}, {"lang": "en", "value": "CWE-451"}, {"lang": "en", "value": "CWE-923"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.19.1)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "cryptomator", "source": "cna", "vendor": "cryptomator"}, "product": "cryptomator", "vendor": "cryptomator"}], "analysis": {"en": {"generated_at": "2026-03-26T16:07:51.656565+00:00", "value": {"mitigation_remediation": ["Install Cryptomator version 1.19.1 or later to apply the integrity\u2011check fix.", "Verify that the vault.cryptomator file is signed or use file integrity monitoring tools.", "Restrict file permissions so only the owner can modify the vault configuration.", "Audit and monitor for unexpected changes to vault.cryptomator files."], "summary": {"action": "Apply Patch", "impact": "Unauthorized API Access"}, "threat_synthesis": {"affected_systems": "Cryptomator, the open\u2011source client for encrypted cloud storage, is affected. Users who run versions prior to 1.19.1 and unlock Hub\u2011backed vaults in environments where an attacker can alter the vault.cryptomator file are vulnerable. Version 1.19.1 contains a patch that restores integrity verification of the configuration file and the existing hosts list. The vulnerability applies to all releases before that point.", "description_and_impact": "Cryptomator normally encrypts files stored on cloud services and relies on an integrity check of the vault configuration file. An attacker who can modify this file bypasses host authenticity validation during Hub key loading, creating a man\u2011in\u2011the\u2011middle scenario. The vulnerability enables a malicious endpoint to be paired with a legitimate authentication endpoint, allowing the extraction of access tokens used to communicate with the cloud. The flaw is characterized by CWE\u2011346, CWE\u2011354, CWE\u2011451, and CWE\u2011923, and has a CVSS score of 7.6, indicating high severity.", "risk_and_exploitability": "The risk is high due to the potential for token theft, but the EPSS score <1% indicates low likelihood of widespread exploitation at present. The vulnerability is not cataloged in CISA\u2019s KEV list. Exploitation requires the attacker to have the ability to tamper with the configuration file on the client machine or the network path used to retrieve it, making it most likely in scenarios where local credentials are compromised or the user accepts malicious updates. The attack path is relatively straightforward once file tampering is possible, and it can result in unauthorized API calls to the cloud provider on the victim\u2019s behalf."}}}}, "created": "2026-03-23T09:53:06.000114+00:00", "updated": "2026-03-27T09:21:33.249238+00:00", "vendors": ["cryptomator", "cryptomator$PRODUCT$cryptomator"]}