{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6b82abcd80449a30b561d823193f9ecea542a625"
            }
          ],
          "repo": "https://github.com/cryptomator/cryptomator",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4be327608a6d478d5d9055121f0ab28fd649b864"
            }
          ],
          "repo": "https://github.com/cryptomator/cryptomator",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-34rf-rwr3-7g43"
  ],
  "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"
  },
  "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.",
  "id": "CVE-2026-32303",
  "modified": "2026-04-01T23:10:25.492719773Z",
  "published": "2026-03-20T17:57:31.884Z",
  "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"
    }
  ],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Cryptomator: Tampered vault configuration allows MITM attack on Hub API"
}