{"id":"CVE-2026-32303","summary":"Cryptomator: Tampered vault configuration allows MITM attack on Hub API","details":"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.","aliases":["GHSA-34rf-rwr3-7g43"],"modified":"2026-04-10T05:42:22.356829Z","published":"2026-03-20T17:57:31.884Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-346","CWE-354","CWE-451","CWE-923"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/32xxx/CVE-2026-32303.json"},"references":[{"type":"WEB","url":"https://github.com/cryptomator/cryptomator/releases/tag/1.19.1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/32xxx/CVE-2026-32303.json"},{"type":"ADVISORY","url":"https://github.com/cryptomator/cryptomator/security/advisories/GHSA-34rf-rwr3-7g43"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-32303"},{"type":"FIX","url":"https://github.com/cryptomator/cryptomator/commit/6b82abcd80449a30b561d823193f9ecea542a625"},{"type":"FIX","url":"https://github.com/cryptomator/cryptomator/pull/4179"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/cryptomator/cryptomator","events":[{"introduced":"0"},{"fixed":"6b82abcd80449a30b561d823193f9ecea542a625"}]},{"type":"GIT","repo":"https://github.com/cryptomator/cryptomator","events":[{"introduced":"0"},{"fixed":"4be327608a6d478d5d9055121f0ab28fd649b864"}]}],"versions":["0.10.0","0.11.0","0.3.0","0.4.0","0.5.0","0.5.1","0.6.0","0.7.0","0.7.1","0.8.0","0.8.1","0.9.0","1.0.0","1.0.1","1.1.0","1.1.1","1.1.2","1.1.3","1.1.4","1.10.0","1.10.1","1.11.0","1.11.1","1.12.0","1.12.1","1.12.2","1.12.3","1.12.3-beta1","1.12.4","1.13.0","1.14.0","1.14.1","1.14.2","1.15.0","1.15.1","1.15.2","1.15.3","1.16.0","1.16.1","1.16.2","1.17.0","1.17.1","1.18.0","1.18.1","1.19.0","1.2.0","1.2.1","1.2.2","1.2.3","1.2.4","1.3.0","1.3.0-rc1","1.3.0-rc2","1.3.0-rc3","1.3.0-rc4","1.3.0-rc5","1.3.0-rc6","1.3.0-rc7","1.3.0-rc8","1.3.0-rc9","1.3.1","1.3.2","1.3.3","1.3.4","1.3.5","1.4.0","1.4.0-beta1","1.4.0-beta2","1.4.0-beta3","1.4.0-rc1","1.4.1","1.4.10","1.4.11","1.4.12","1.4.13","1.4.14","1.4.15","1.4.16","1.4.2","1.4.3","1.4.4","1.4.5","1.4.5-beta1","1.4.6","1.4.6-beta1","1.4.7","1.4.8","1.4.9","1.5.0","1.5.0-alpha1","1.5.0-alpha2","1.5.0-beta1","1.5.0-beta2","1.5.0-beta3","1.5.1","1.5.10","1.5.11","1.5.12","1.5.13","1.5.14","1.5.15","1.5.16","1.5.17","1.5.18","1.5.19","1.5.2","1.5.3","1.5.4","1.5.5","1.5.6","1.5.7","1.5.8","1.5.9","1.6.0","1.6.1","1.6.10","1.6.11","1.6.12","1.6.13","1.6.14","1.6.15","1.6.16","1.6.17","1.6.2","1.6.3","1.6.4","1.6.5","1.6.6","1.6.7","1.6.8","1.6.9","1.7.0","1.7.1","1.7.2","1.7.3","1.7.4","1.7.5","1.8.0","1.9.0","1.9.1","1.9.2","1.9.3","1.9.4","continuous","nightly"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-32303.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N"}]}