{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-32303","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-03-11T21:16:21.659Z","datePublished":"2026-03-20T17:57:31.884Z","dateUpdated":"2026-03-23T21:41:57.420Z"},"containers":{"cna":{"title":"Cryptomator: Tampered vault configuration allows MITM attack on Hub API","problemTypes":[{"descriptions":[{"cweId":"CWE-346","lang":"en","description":"CWE-346: Origin Validation Error","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-354","lang":"en","description":"CWE-354: Improper Validation of Integrity Check Value","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-451","lang":"en","description":"CWE-451: User Interface (UI) Misrepresentation of Critical Information","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-923","lang":"en","description":"CWE-923: Improper Restriction of Communication Channel to Intended Endpoints","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"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"}}],"references":[{"name":"https://github.com/cryptomator/cryptomator/security/advisories/GHSA-34rf-rwr3-7g43","tags":["x_refsource_CONFIRM"],"url":"https://github.com/cryptomator/cryptomator/security/advisories/GHSA-34rf-rwr3-7g43"},{"name":"https://github.com/cryptomator/cryptomator/pull/4179","tags":["x_refsource_MISC"],"url":"https://github.com/cryptomator/cryptomator/pull/4179"},{"name":"https://github.com/cryptomator/cryptomator/commit/6b82abcd80449a30b561d823193f9ecea542a625","tags":["x_refsource_MISC"],"url":"https://github.com/cryptomator/cryptomator/commit/6b82abcd80449a30b561d823193f9ecea542a625"},{"name":"https://github.com/cryptomator/cryptomator/releases/tag/1.19.1","tags":["x_refsource_MISC"],"url":"https://github.com/cryptomator/cryptomator/releases/tag/1.19.1"}],"affected":[{"vendor":"cryptomator","product":"cryptomator","versions":[{"version":"< 1.19.1","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-03-20T17:57:31.884Z"},"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."}],"source":{"advisory":"GHSA-34rf-rwr3-7g43","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-03-23T20:52:44.437617Z","id":"CVE-2026-32303","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-03-23T21:41:57.420Z"}}]}}