{"id":"CVE-2026-32303","aliases":["EUVD-2026-13746","GHSA-34rf-rwr3-7g43"],"status":"published","title":"Cryptomator: Tampered vault configuration allows MITM attack on Hub API","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.","severity":{"version":"3.1","score":7.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00115,"percentile":0.01545,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-346","CWE-354","CWE-451","CWE-923"],"published":"2026-03-20T17:57:31Z","modified":"2026-10-28T02:31:08Z","products":[{"vendor":"cryptomator","product":"cryptomator"}],"references":[{"url":"https://github.com/cryptomator/cryptomator/security/advisories/GHSA-34rf-rwr3-7g43","tags":["x_refsource_CONFIRM","Vendor Advisory","advisory"]},{"url":"https://github.com/cryptomator/cryptomator/pull/4179","tags":["x_refsource_MISC","Issue Tracking","fix"]},{"url":"https://github.com/cryptomator/cryptomator/commit/6b82abcd80449a30b561d823193f9ecea542a625","tags":["x_refsource_MISC","Patch","fix"]},{"url":"https://github.com/cryptomator/cryptomator/releases/tag/1.19.1","tags":["x_refsource_MISC","Release Notes","web"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/32xxx/CVE-2026-32303.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-32303","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-32303","title":"Cryptomator: Tampered vault configuration allows MITM attack on Hub API","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.","status":"published","published":"2026-03-20T17:57:31.884Z","modified":"2026-03-23T21:41:57.42Z","cvss":[{"version":"3.1","score":7.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N","level":"high","assessor":"cna"}],"cwes":["CWE-346","CWE-354","CWE-451","CWE-923"],"updated_at":"2026-11-02T14:19:57.100857Z"}],"euvd":[{"id":"EUVD-2026-13746","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.","status":"published","published":"2026-03-20T17:57:31Z","modified":"2026-03-23T21:41:57Z","cvss":[{"version":"3.1","score":7.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N","level":"high"}],"updated_at":"2026-11-02T19:25:30.696372Z"}],"nvd":[{"id":"CVE-2026-32303","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.","status":"published","published":"2026-03-20T18:16:14.593Z","modified":"2026-06-17T10:35:31.807Z","cvss":[{"version":"3.1","score":7.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N","level":"high","assessor":"secondary"},{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-346","CWE-354","CWE-451","CWE-923"],"updated_at":"2026-11-02T14:12:10.126802Z"}],"osv":[{"id":"CVE-2026-32303","title":"Cryptomator: Tampered vault configuration allows MITM attack on Hub API","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.","status":"published","published":"2026-03-20T17:57:31.884Z","modified":"2026-10-28T02:31:08.34052429Z","cvss":[{"version":"3.1","score":7.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N","level":"high"}],"cwes":["CWE-346","CWE-354","CWE-451","CWE-923"],"updated_at":"2026-11-02T15:45:01.218144Z"}]}}