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    "aggregate_severity": {
      "text": "Important"
    },
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "TuxCare License Agreement",
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        "url": "https://www.first.org/tlp/"
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      {
        "category": "legal_disclaimer",
        "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Cloud Linux Inc. and provide a link to the original.",
        "title": "Terms of Use"
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        "category": "details",
        "text": "CVE-2026-40020: imap-acl: reject CR/LF injection in SETACL identifier\n- CVE-2026-42006: lib-imap: fix list_count_limit to actually limit '(' (incomplete fix for CVE-2026-27857)\n- CVE-2026-33603: login-common: reject non-base64 SASL responses to prevent SCRAM channel binding bypass\n- CVE-2026-40016: lib-sieve: enforce sieve_max_cpu_time inside :contains/:matches matcher loops",
        "title": "Details"
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        "summary": "https://cve.tuxcare.com/els/releases/CLSA-2026:1781096989",
        "url": "https://cve.tuxcare.com/els/releases/CLSA-2026:1781096989"
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      "generator": {
        "date": "2026-06-10T13:24:34Z",
        "engine": {
          "name": "pyCSAF"
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      "id": "CLSA-2026:1781096989",
      "initial_release_date": "2026-06-10T13:24:34Z",
      "revision_history": [
        {
          "date": "2026-06-10T13:24:34Z",
          "number": "1",
          "summary": "Initial version"
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      "status": "final",
      "version": "1"
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    "title": "dovecot: Fix of 4 CVEs"
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          "title": "Vulnerability description"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
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        {
          "category": "description",
          "text": "An attacker can cause uncontrolled memory usage with excessive bracing over IMAP. The fix in CVE-2026-27857 was incomplete, only blocking one way of doing this, so there was still another way left open. In particular, the fix was for closing braces, but you could still use open braces to bypass the limit. Using excessive bracing, attacker can cause memory usage up to configured memory limit. Install fixed version, or configure vsz_limit for imap process to low value. No publicly available exploits are known.",
          "title": "Vulnerability description"
        }
      ],
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      "threats": [
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          "details": "Important"
        }
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    {
      "cve": "CVE-2026-40020",
      "cwe": {
        "id": "CWE-284",
        "name": "Improper Access Control"
      },
      "notes": [
        {
          "category": "description",
          "text": "Attacker can use the IMAP SETACL command to inject the anyone permission to user's dovecot-acl file even if imap_acl_allow_anyone=no. This causes folders to be spammed to all users. The impact is limited to being able to spam folders to other users, no unexpected access is gained. Install to fixed version. No publicly available exploits are known.",
          "title": "Vulnerability description"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
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            "Rocky Linux-9.6:dovecot-pgsql-1:2.3.16-15.el9.tuxcare.els1.x86_64",
            "Rocky Linux-9.6:dovecot-pgsql-1:2.3.16-15.el9.tuxcare.els2.x86_64",
            "Rocky Linux-9.6:dovecot-pigeonhole-1:2.3.16-15.el9.tuxcare.els1.x86_64",
            "Rocky Linux-9.6:dovecot-pigeonhole-1:2.3.16-15.el9.tuxcare.els2.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
            "version": "3.1"
          },
          "products": [
            "AlmaLinux-9.6:dovecot-1:2.3.16-15.el9.tuxcare.els3.i686",
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            "AlmaLinux-9.6:dovecot-mysql-1:2.3.16-15.el9.tuxcare.els3.x86_64",
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            "Rocky Linux-9.6:dovecot-devel-1:2.3.16-15.el9.tuxcare.els3.i686",
            "Rocky Linux-9.6:dovecot-devel-1:2.3.16-15.el9.tuxcare.els3.x86_64",
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          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ]
    }
  ]
}