{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2026-52687",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-52687",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-08-28T10:12:31.701Z",
    "updatedAt": "2026-08-28T15:53:30.084Z",
    "importedAt": "2026-10-24T01:58:14.884Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": null,
      "summary": "An attacker that has valid credentials can select a compression algorithm for the IMAP connection whose decompression state requires a large amount of memory, and open several such connections. The memory limit of the process is reached with only a few connections, terminating the process and all connections it handles, which can cause degradation or denial of service for IMAP. Disable IMAP compression. Alternatively limit the number of connections handled by a single imap-login process, though this has a performance impact. Update to non-vulnerable version. No publicly available exploits are known.",
      "affected": [
        {
          "vendor": "Open-Xchange GmbH",
          "product": "OX Dovecot Pro",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "2.3.11",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "2.3.22.2"
            },
            {
              "version": "3.0.0",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "3.0.7"
            },
            {
              "version": "3.1.0",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "3.1.6"
            }
          ]
        },
        {
          "vendor": "Open-Xchange GmbH",
          "product": "OX Dovecot CE",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "2.3.11",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "2.4.5"
            }
          ]
        }
      ]
    }
  }
}