{
  "cveId": "CVE-2026-40016",
  "url": "https://patchblox.com/security/cve/CVE-2026-40016",
  "summary": "CVE-2026-40016 is fixed in 19 products on 1 platform, first by dovecot-auth-lua 1:2.3.16\u002Bdfsg1-3ubuntu2.9, released May 12, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "dovecot: Attacker can upload a malicious Sieve script over ManageSieve service (or locally) to bypass configured CPU time limi...",
  "description": "Attacker can upload a malicious Sieve script over ManageSieve service (or locally) to bypass configured CPU time limits for Sieve up to 130 times of the configured limit. Attacker can use this to degrade server performance and bypass configured CPU time limits for Sieve scripts. Install fixed version, or alternatively prevent direct access to Sieve scripts via ManageSieve or local access. No publicly available exploits are known.",
  "published": "2026-05-12T07:17:00Z",
  "severity": "medium",
  "cvss": 6.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00338,
  "epssPercentile": 0.27348,
  "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\u002Bdeb12u6",
      "fix": "DEBIAN-CVE-2026-40016",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-40016",
      "released": "2026-05-27T17:38:13Z"
    },
    {
      "platform": "linux",
      "product": "dovecot",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "1:2.4.1\u002Bdfsg1-6\u002Bdeb13u6",
      "fix": "DEBIAN-CVE-2026-40016",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-40016",
      "released": "2026-05-27T17:38:13Z"
    },
    {
      "platform": "linux",
      "product": "dovecot",
      "release": "Debian 14",
      "fixedVersion": "1:2.4.4\u002Bdfsg1-1",
      "fix": "DEBIAN-CVE-2026-40016",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-40016",
      "released": "2026-05-27T17:38:13Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-auth-lua",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1:2.3.16\u002Bdfsg1-3ubuntu2.9",
      "fix": "dovecot-auth-lua 1:2.3.16\u002Bdfsg1-3ubuntu2.9",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-dovecot-auth-lua-1-2.3.16-dfsg1-3ubuntu2.9",
      "released": "2026-05-12T07:17:00Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-auth-lua",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "1:2.3.21\u002Bdfsg1-2ubuntu6.5",
      "fix": "dovecot-auth-lua 1:2.3.21\u002Bdfsg1-2ubuntu6.5",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-dovecot-auth-lua-1-2.3.21-dfsg1-2ubuntu6.5",
      "released": "2026-05-12T07:17:00Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-auth-lua",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "1:2.4.1\u002Bdfsg1-5ubuntu4.2",
      "fix": "dovecot-auth-lua 1:2.4.1\u002Bdfsg1-5ubuntu4.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-dovecot-auth-lua-1-2.4.1-dfsg1-5ubuntu4.2",
      "released": "2026-05-12T07:17:00Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-auth-lua",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "1:2.4.2\u002Bdfsg1-3ubuntu2.1",
      "fix": "dovecot-auth-lua 1:2.4.2\u002Bdfsg1-3ubuntu2.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-dovecot-auth-lua-1-2.4.2-dfsg1-3ubuntu2.1",
      "released": "2026-05-12T07:17:00Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-core",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1:2.3.16\u002Bdfsg1-3ubuntu2.9",
      "fix": "dovecot-core 1:2.3.16\u002Bdfsg1-3ubuntu2.9",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-dovecot-core-1-2.3.16-dfsg1-3ubuntu2.9",
      "released": "2026-05-12T07:17:00Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-core",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "1:2.3.21\u002Bdfsg1-2ubuntu6.5",
      "fix": "dovecot-core 1:2.3.21\u002Bdfsg1-2ubuntu6.5",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-dovecot-core-1-2.3.21-dfsg1-2ubuntu6.5",
      "released": "2026-05-12T07:17:00Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-core",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "1:2.4.1\u002Bdfsg1-5ubuntu4.2",
      "fix": "dovecot-core 1:2.4.1\u002Bdfsg1-5ubuntu4.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-dovecot-core-1-2.4.1-dfsg1-5ubuntu4.2",
      "released": "2026-05-12T07:17:00Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-core",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "1:2.4.2\u002Bdfsg1-3ubuntu2.1",
      "fix": "dovecot-core 1:2.4.2\u002Bdfsg1-3ubuntu2.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-dovecot-core-1-2.4.2-dfsg1-3ubuntu2.1",
      "released": "2026-05-12T07:17:00Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-flatcurve",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "1:2.4.1\u002Bdfsg1-5ubuntu4.2",
      "fix": "dovecot-flatcurve 1:2.4.1\u002Bdfsg1-5ubuntu4.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-dovecot-flatcurve-1-2.4.1-dfsg1-5ubuntu4.2",
      "released": "2026-05-12T07:17:00Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-flatcurve",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "1:2.4.2\u002Bdfsg1-3ubuntu2.1",
      "fix": "dovecot-flatcurve 1:2.4.2\u002Bdfsg1-3ubuntu2.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-dovecot-flatcurve-1-2.4.2-dfsg1-3ubuntu2.1",
      "released": "2026-05-12T07:17:00Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-gssapi",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1:2.3.16\u002Bdfsg1-3ubuntu2.9",
      "fix": "dovecot-gssapi 1:2.3.16\u002Bdfsg1-3ubuntu2.9",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-dovecot-gssapi-1-2.3.16-dfsg1-3ubuntu2.9",
      "released": "2026-05-12T07:17:00Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-gssapi",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "1:2.3.21\u002Bdfsg1-2ubuntu6.5",
      "fix": "dovecot-gssapi 1:2.3.21\u002Bdfsg1-2ubuntu6.5",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-dovecot-gssapi-1-2.3.21-dfsg1-2ubuntu6.5",
      "released": "2026-05-12T07:17:00Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-gssapi",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "1:2.4.1\u002Bdfsg1-5ubuntu4.2",
      "fix": "dovecot-gssapi 1:2.4.1\u002Bdfsg1-5ubuntu4.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-dovecot-gssapi-1-2.4.1-dfsg1-5ubuntu4.2",
      "released": "2026-05-12T07:17:00Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-gssapi",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "1:2.4.2\u002Bdfsg1-3ubuntu2.1",
      "fix": "dovecot-gssapi 1:2.4.2\u002Bdfsg1-3ubuntu2.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-dovecot-gssapi-1-2.4.2-dfsg1-3ubuntu2.1",
      "released": "2026-05-12T07:17:00Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-imapd",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1:2.3.16\u002Bdfsg1-3ubuntu2.9",
      "fix": "dovecot-imapd 1:2.3.16\u002Bdfsg1-3ubuntu2.9",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-dovecot-imapd-1-2.3.16-dfsg1-3ubuntu2.9",
      "released": "2026-05-12T07:17:00Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-imapd",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "1:2.3.21\u002Bdfsg1-2ubuntu6.5",
      "fix": "dovecot-imapd 1:2.3.21\u002Bdfsg1-2ubuntu6.5",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-dovecot-imapd-1-2.3.21-dfsg1-2ubuntu6.5",
      "released": "2026-05-12T07:17:00Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-imapd",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "1:2.4.1\u002Bdfsg1-5ubuntu4.2",
      "fix": "dovecot-imapd 1:2.4.1\u002Bdfsg1-5ubuntu4.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-dovecot-imapd-1-2.4.1-dfsg1-5ubuntu4.2",
      "released": "2026-05-12T07:17:00Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-imapd",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "1:2.4.2\u002Bdfsg1-3ubuntu2.1",
      "fix": "dovecot-imapd 1:2.4.2\u002Bdfsg1-3ubuntu2.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-dovecot-imapd-1-2.4.2-dfsg1-3ubuntu2.1",
      "released": "2026-05-12T07:17:00Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-ldap",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1:2.3.16\u002Bdfsg1-3ubuntu2.9",
      "fix": "dovecot-ldap 1:2.3.16\u002Bdfsg1-3ubuntu2.9",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-dovecot-ldap-1-2.3.16-dfsg1-3ubuntu2.9",
      "released": "2026-05-12T07:17:00Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-ldap",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "1:2.3.21\u002Bdfsg1-2ubuntu6.5",
      "fix": "dovecot-ldap 1:2.3.21\u002Bdfsg1-2ubuntu6.5",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-dovecot-ldap-1-2.3.21-dfsg1-2ubuntu6.5",
      "released": "2026-05-12T07:17:00Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-ldap",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "1:2.4.1\u002Bdfsg1-5ubuntu4.2",
      "fix": "dovecot-ldap 1:2.4.1\u002Bdfsg1-5ubuntu4.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-dovecot-ldap-1-2.4.1-dfsg1-5ubuntu4.2",
      "released": "2026-05-12T07:17:00Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-ldap",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "1:2.4.2\u002Bdfsg1-3ubuntu2.1",
      "fix": "dovecot-ldap 1:2.4.2\u002Bdfsg1-3ubuntu2.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-dovecot-ldap-1-2.4.2-dfsg1-3ubuntu2.1",
      "released": "2026-05-12T07:17:00Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-lmtpd",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1:2.3.16\u002Bdfsg1-3ubuntu2.9",
      "fix": "dovecot-lmtpd 1:2.3.16\u002Bdfsg1-3ubuntu2.9",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-dovecot-lmtpd-1-2.3.16-dfsg1-3ubuntu2.9",
      "released": "2026-05-12T07:17:00Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-lmtpd",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "1:2.3.21\u002Bdfsg1-2ubuntu6.5",
      "fix": "dovecot-lmtpd 1:2.3.21\u002Bdfsg1-2ubuntu6.5",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-dovecot-lmtpd-1-2.3.21-dfsg1-2ubuntu6.5",
      "released": "2026-05-12T07:17:00Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-lmtpd",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "1:2.4.1\u002Bdfsg1-5ubuntu4.2",
      "fix": "dovecot-lmtpd 1:2.4.1\u002Bdfsg1-5ubuntu4.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-dovecot-lmtpd-1-2.4.1-dfsg1-5ubuntu4.2",
      "released": "2026-05-12T07:17:00Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-lmtpd",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "1:2.4.2\u002Bdfsg1-3ubuntu2.1",
      "fix": "dovecot-lmtpd 1:2.4.2\u002Bdfsg1-3ubuntu2.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-dovecot-lmtpd-1-2.4.2-dfsg1-3ubuntu2.1",
      "released": "2026-05-12T07:17:00Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-lucene",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1:2.3.16\u002Bdfsg1-3ubuntu2.9",
      "fix": "dovecot-lucene 1:2.3.16\u002Bdfsg1-3ubuntu2.9",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-dovecot-lucene-1-2.3.16-dfsg1-3ubuntu2.9",
      "released": "2026-05-12T07:17:00Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-managesieved",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1:2.3.16\u002Bdfsg1-3ubuntu2.9",
      "fix": "dovecot-managesieved 1:2.3.16\u002Bdfsg1-3ubuntu2.9",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-dovecot-managesieved-1-2.3.16-dfsg1-3ubuntu2.9",
      "released": "2026-05-12T07:17:00Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-managesieved",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "1:2.3.21\u002Bdfsg1-2ubuntu6.5",
      "fix": "dovecot-managesieved 1:2.3.21\u002Bdfsg1-2ubuntu6.5",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-dovecot-managesieved-1-2.3.21-dfsg1-2ubuntu6.5",
      "released": "2026-05-12T07:17:00Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-managesieved",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "1:2.4.1\u002Bdfsg1-5ubuntu4.2",
      "fix": "dovecot-managesieved 1:2.4.1\u002Bdfsg1-5ubuntu4.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-dovecot-managesieved-1-2.4.1-dfsg1-5ubuntu4.2",
      "released": "2026-05-12T07:17:00Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-managesieved",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "1:2.4.2\u002Bdfsg1-3ubuntu2.1",
      "fix": "dovecot-managesieved 1:2.4.2\u002Bdfsg1-3ubuntu2.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-dovecot-managesieved-1-2.4.2-dfsg1-3ubuntu2.1",
      "released": "2026-05-12T07:17:00Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-mysql",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1:2.3.16\u002Bdfsg1-3ubuntu2.9",
      "fix": "dovecot-mysql 1:2.3.16\u002Bdfsg1-3ubuntu2.9",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-dovecot-mysql-1-2.3.16-dfsg1-3ubuntu2.9",
      "released": "2026-05-12T07:17:00Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-mysql",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "1:2.3.21\u002Bdfsg1-2ubuntu6.5",
      "fix": "dovecot-mysql 1:2.3.21\u002Bdfsg1-2ubuntu6.5",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-dovecot-mysql-1-2.3.21-dfsg1-2ubuntu6.5",
      "released": "2026-05-12T07:17:00Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-mysql",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "1:2.4.1\u002Bdfsg1-5ubuntu4.2",
      "fix": "dovecot-mysql 1:2.4.1\u002Bdfsg1-5ubuntu4.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-dovecot-mysql-1-2.4.1-dfsg1-5ubuntu4.2",
      "released": "2026-05-12T07:17:00Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-mysql",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "1:2.4.2\u002Bdfsg1-3ubuntu2.1",
      "fix": "dovecot-mysql 1:2.4.2\u002Bdfsg1-3ubuntu2.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-dovecot-mysql-1-2.4.2-dfsg1-3ubuntu2.1",
      "released": "2026-05-12T07:17:00Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-pgsql",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1:2.3.16\u002Bdfsg1-3ubuntu2.9",
      "fix": "dovecot-pgsql 1:2.3.16\u002Bdfsg1-3ubuntu2.9",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-dovecot-pgsql-1-2.3.16-dfsg1-3ubuntu2.9",
      "released": "2026-05-12T07:17:00Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-pgsql",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "1:2.3.21\u002Bdfsg1-2ubuntu6.5",
      "fix": "dovecot-pgsql 1:2.3.21\u002Bdfsg1-2ubuntu6.5",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-dovecot-pgsql-1-2.3.21-dfsg1-2ubuntu6.5",
      "released": "2026-05-12T07:17:00Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-pgsql",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "1:2.4.1\u002Bdfsg1-5ubuntu4.2",
      "fix": "dovecot-pgsql 1:2.4.1\u002Bdfsg1-5ubuntu4.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-dovecot-pgsql-1-2.4.1-dfsg1-5ubuntu4.2",
      "released": "2026-05-12T07:17:00Z"
    },
    {
      "platform": "linux",
      "product": "dovecot-pgsql",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
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      "fix": "dovecot-pgsql 1:2.4.2\u002Bdfsg1-3ubuntu2.1",
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  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}