{
  "cveId": "CVE-2026-33604",
  "url": "https://patchblox.com/security/cve/CVE-2026-33604",
  "summary": "CVE-2026-33604 is fixed in 12 products on 1 platform, first by SUSE-SU-2026:23595-1, released September 1, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "dovecot: An attacker that can get Dovecot to relay a message, for example through Sieve redirect or submission relay, can use...",
  "description": "An attacker that can get Dovecot to relay a message, for example through Sieve redirect or submission relay, can use a crafted line ending in the message body to bypass the outbound protection that prevents message content from being interpreted as SMTP commands. A downstream mail server that hasn\u0027t yet fixed the SMTP smuggling vulnerability can be tricked into treating part of the message body as new SMTP commands, allowing injection of spoofed email. This is the same vulnerability class as CVE-2023-51764 and CVE-2023-51766. Where you control the receiving mail servers, ensure they reject bare carriage returns in message data. Update to non-vulnerable version. No publicly available exploits are known.",
  "published": "2026-08-28T12:16:27Z",
  "severity": "medium",
  "cvss": 5.9,
  "cvssVector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N",
  "epss": 0.00314,
  "epssPercentile": 0.24433,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "dovecot",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "1:2.3.19.1\u002Bdfsg1-2.1\u002Bdeb12u7",
      "fix": "DEBIAN-CVE-2026-33604",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-33604",
      "released": "2026-09-10T12:12:19Z"
    },
    {
      "platform": "linux",
      "product": "dovecot",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "1:2.4.1\u002Bdfsg1-6\u002Bdeb13u7",
      "fix": "DEBIAN-CVE-2026-33604",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-33604",
      "released": "2026-09-10T12:12:19Z"
    },
    {
      "platform": "linux",
      "product": "dovecot",
      "release": "Debian 14",
      "fixedVersion": "1:2.4.5\u002Bdfsg1-1",
      "fix": "DEBIAN-CVE-2026-33604",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-33604",
      "released": "2026-09-10T12:12:19Z"
    },
    {
      "platform": "linux",
      "product": "dovecot",
      "release": "Fedora 43",
      "fixedVersion": "1:2.4.5-1.fc43",
      "fix": "FEDORA-2026-E8A6485109",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-e8a6485109",
      "released": "2026-09-10T05:35:17Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-debuginfo",
      "release": "Fedora 43",
      "fixedVersion": "1:2.4.5-1.fc43",
      "fix": "FEDORA-2026-E8A6485109",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-e8a6485109",
      "released": "2026-09-10T05:35:17Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-debugsource",
      "release": "Fedora 43",
      "fixedVersion": "1:2.4.5-1.fc43",
      "fix": "FEDORA-2026-E8A6485109",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-e8a6485109",
      "released": "2026-09-10T05:35:17Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-devel",
      "release": "Fedora 43",
      "fixedVersion": "1:2.4.5-1.fc43",
      "fix": "FEDORA-2026-E8A6485109",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-e8a6485109",
      "released": "2026-09-10T05:35:17Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-mysql",
      "release": "Fedora 43",
      "fixedVersion": "1:2.4.5-1.fc43",
      "fix": "FEDORA-2026-E8A6485109",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-e8a6485109",
      "released": "2026-09-10T05:35:17Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-mysql-debuginfo",
      "release": "Fedora 43",
      "fixedVersion": "1:2.4.5-1.fc43",
      "fix": "FEDORA-2026-E8A6485109",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-e8a6485109",
      "released": "2026-09-10T05:35:17Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-pgsql",
      "release": "Fedora 43",
      "fixedVersion": "1:2.4.5-1.fc43",
      "fix": "FEDORA-2026-E8A6485109",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-e8a6485109",
      "released": "2026-09-10T05:35:17Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-pgsql-debuginfo",
      "release": "Fedora 43",
      "fixedVersion": "1:2.4.5-1.fc43",
      "fix": "FEDORA-2026-E8A6485109",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-e8a6485109",
      "released": "2026-09-10T05:35:17Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-pigeonhole",
      "release": "Fedora 43",
      "fixedVersion": "1:2.4.5-1.fc43",
      "fix": "FEDORA-2026-E8A6485109",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-e8a6485109",
      "released": "2026-09-10T05:35:17Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-pigeonhole-debuginfo",
      "release": "Fedora 43",
      "fixedVersion": "1:2.4.5-1.fc43",
      "fix": "FEDORA-2026-E8A6485109",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-e8a6485109",
      "released": "2026-09-10T05:35:17Z"
    },
    {
      "platform": "linux",
      "product": "dovecot23",
      "release": "sles 15.6",
      "fixedVersion": "2.3.21.1-150200.76.1",
      "fix": "SUSE-SU-2026:4139-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-4139-1",
      "released": "2026-09-14T07:22:32Z"
    },
    {
      "platform": "linux",
      "product": "dovecot23",
      "release": "sles 15.7",
      "fixedVersion": "2.3.21.1-150200.76.1",
      "fix": "SUSE-SU-2026:4139-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-4139-1",
      "released": "2026-09-14T07:22:32Z"
    },
    {
      "platform": "linux",
      "product": "dovecot24",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "2.4.4-160000.2.1",
      "fix": "OPENSUSE-SU-2026:21720-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-21720-1",
      "released": "2026-09-01T14:18:02Z"
    },
    {
      "platform": "linux",
      "product": "dovecot24",
      "release": "sles 16.0",
      "fixedVersion": "2.4.4-160000.2.1",
      "fix": "SUSE-SU-2026:23595-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-23595-1",
      "released": "2026-09-01T14:12:16Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}