{
  "fix": "OPENSUSE-SU-2026:21720-1",
  "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-21720-1",
  "summary": "OPENSUSE-SU-2026:21720-1, released September 1, 2026, fixes 24 CVEs in dovecot24 (version 2.4.4-160000.2.1). None of them is reported as exploited. Patch Radar priority: High.",
  "platform": "linux",
  "type": "advisory",
  "title": "dovecot24 security update",
  "released": "2026-09-01T14:18:02Z",
  "priority": "High",
  "priorityTier": 3,
  "priorityReason": "Closes CVE-2026-33263, high severity",
  "supported": true,
  "cveCount": 24,
  "exploitedCveCount": 0,
  "kevCveCount": 0,
  "ransomwareCveCount": 0,
  "maxEpss": 0.00868,
  "maxCvss": 9.1,
  "vendorAdvisory": "https://osv.dev/vulnerability/openSUSE-SU-2026:21720-1",
  "appliesTo": [
    {
      "product": "dovecot24",
      "productUrl": "https://patchblox.com/security/product/linux/dovecot24",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "2.4.4-160000.2.1",
      "supported": true
    }
  ],
  "cves": [
    {
      "cveId": "CVE-2026-33263",
      "url": "https://patchblox.com/security/cve/CVE-2026-33263",
      "title": "dovecot: When mail_max_userip_connections is set (default 10) and reached, submission-login can crash with epoll() panic cause...",
      "priority": "High",
      "severity": "important",
      "cvss": 9.1,
      "epss": 0.00554,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-33605",
      "url": "https://patchblox.com/security/cve/CVE-2026-33605",
      "title": "dovecot: An unauthenticated attacker can crash the ManageSieve login process by sending a small malformed command before authe...",
      "priority": "High",
      "severity": "important",
      "cvss": 9.1,
      "epss": 0.00449,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-42391",
      "url": "https://patchblox.com/security/cve/CVE-2026-42391",
      "title": "dovecot: An unauthenticated attacker can send an IMAP ID command with a very large number of parameters before logging in, whi...",
      "priority": "High",
      "severity": "important",
      "cvss": 9.1,
      "epss": 0.00449,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-27852",
      "url": "https://patchblox.com/security/cve/CVE-2026-27852",
      "title": "dovecot: Dovecot is an IMAP server for Linux and other UNIX-like systems, written primarily with security in mind",
      "priority": "High",
      "severity": "Important",
      "cvss": 9.1,
      "epss": 0.0043,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-42007",
      "url": "https://patchblox.com/security/cve/CVE-2026-42007",
      "title": "dovecot: An attacker that has valid credentials can use a Sieve script with the editheader extension to trigger a use-after-fr...",
      "priority": "High",
      "severity": "important",
      "cvss": 9.1,
      "epss": 0.00345,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-40018",
      "url": "https://patchblox.com/security/cve/CVE-2026-40018",
      "title": "dovecot: None None None No publicly available exploits are known.",
      "priority": "High",
      "severity": "important",
      "cvss": 9.1,
      "epss": 0.00317,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-73208",
      "url": "https://patchblox.com/security/cve/CVE-2026-73208",
      "title": "dovecot: An attacker that holds a token intended for a different purpose can authenticate, because when an OAuth2 token respon...",
      "priority": "High",
      "severity": "important",
      "cvss": 9.1,
      "epss": 0.00312,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-40013",
      "url": "https://patchblox.com/security/cve/CVE-2026-40013",
      "title": "dovecot: An attacker that has valid credentials can submit a Sieve script containing an extreme numeric literal, which causes...",
      "priority": "Routine",
      "severity": "medium",
      "cvss": 4.3,
      "epss": 0.00868,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-33607",
      "url": "https://patchblox.com/security/cve/CVE-2026-33607",
      "title": "dovecot: An attacker that has valid credentials can use IMAP LIST command to consume CPU",
      "priority": "Routine",
      "severity": "medium",
      "cvss": 4.3,
      "epss": 0.00554,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-40015",
      "url": "https://patchblox.com/security/cve/CVE-2026-40015",
      "title": "dovecot: An attacker that has valid credentials can open many connections to the imap-hibernate service and send invalid comma...",
      "priority": "Routine",
      "severity": "medium",
      "cvss": 4.3,
      "epss": 0.00554,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-52687",
      "url": "https://patchblox.com/security/cve/CVE-2026-52687",
      "title": "dovecot: An attacker that has valid credentials can select a compression algorithm for the IMAP connection whose decompression...",
      "priority": "Routine",
      "severity": "medium",
      "cvss": 6.5,
      "epss": 0.00398,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-73209",
      "url": "https://patchblox.com/security/cve/CVE-2026-73209",
      "title": "dovecot: An attacker that has valid credentials can send crafted compressed data that causes the affected process to exhaust i...",
      "priority": "Routine",
      "severity": "medium",
      "cvss": 6.5,
      "epss": 0.00398,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-42395",
      "url": "https://patchblox.com/security/cve/CVE-2026-42395",
      "title": "dovecot: A host listed as a trusted proxy can send forwarding information containing a NUL byte, which crashes the login proce...",
      "priority": "Routine",
      "severity": "medium",
      "cvss": 4.3,
      "epss": 0.00352,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-40014",
      "url": "https://patchblox.com/security/cve/CVE-2026-40014",
      "title": "dovecot: An attacker that can send mail to a user can craft a message header that makes the IMAP THREAD command consume CPU di...",
      "priority": "Routine",
      "severity": "medium",
      "cvss": 6.5,
      "epss": 0.00334,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-40017",
      "url": "https://patchblox.com/security/cve/CVE-2026-40017",
      "title": "dovecot: An attacker that can send mail to a user can craft a message header whose values are chosen to collide in an internal...",
      "priority": "Routine",
      "severity": "medium",
      "cvss": 6.5,
      "epss": 0.00334,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-33604",
      "url": "https://patchblox.com/security/cve/CVE-2026-33604",
      "title": "dovecot: An attacker that can get Dovecot to relay a message, for example through Sieve redirect or submission relay, can use...",
      "priority": "Routine",
      "severity": "medium",
      "cvss": 5.9,
      "epss": 0.00314,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-52681",
      "url": "https://patchblox.com/security/cve/CVE-2026-52681",
      "title": "dovecot: Sieve CPU resource usage is tracked in the compiled script, so an attacker that has valid credentials can reset the a...",
      "priority": "Routine",
      "severity": "low",
      "cvss": 3.1,
      "epss": 0.00296,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-42392",
      "url": "https://patchblox.com/security/cve/CVE-2026-42392",
      "title": "dovecot: An attacker that has valid credentials can send an invalid IMAP URLFETCH command, which causes uninitialized memory t...",
      "priority": "Routine",
      "severity": "medium",
      "cvss": 4.3,
      "epss": 0.0027,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-40203",
      "url": "https://patchblox.com/security/cve/CVE-2026-40203",
      "title": "dovecot: When IMAP compression is enabled, the same compression state is reused across responses in a session, so response siz...",
      "priority": "Routine",
      "severity": "low",
      "cvss": 3.7,
      "epss": 0.00257,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-33606",
      "url": "https://patchblox.com/security/cve/CVE-2026-33606",
      "title": "dovecot: Mail content stored by a user can be crafted so that it is interpreted as dsync protocol commands when an administrat...",
      "priority": "Routine",
      "severity": "medium",
      "cvss": 4.8,
      "epss": 0.00246,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-42008",
      "url": "https://patchblox.com/security/cve/CVE-2026-42008",
      "title": "dovecot: Forwarding information received from a host listed as a trusted proxy is not kept separate from Dovecot\u0027s own authent...",
      "priority": "Routine",
      "severity": "medium",
      "cvss": 4.3,
      "epss": 0.00236,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-40205",
      "url": "https://patchblox.com/security/cve/CVE-2026-40205",
      "title": "dovecot: An attacker that holds an OAuth2 token granting only part of the required scopes can authenticate, because when more...",
      "priority": "Routine",
      "severity": "medium",
      "cvss": 5.9,
      "epss": 0.00211,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-40204",
      "url": "https://patchblox.com/security/cve/CVE-2026-40204",
      "title": "dovecot: None None None No publicly available exploits are known.",
      "priority": "Routine",
      "severity": "low",
      "cvss": 3.1,
      "epss": 0.00211,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-42393",
      "url": "https://patchblox.com/security/cve/CVE-2026-42393",
      "title": "dovecot: The comparison used for the doveadm password and API key is not fully timing safe and can reveal the length of the co...",
      "priority": "Routine",
      "severity": "low",
      "cvss": 3.1,
      "epss": 0.00173,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-10T13:56:55Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}