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        "references": [
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            "url": "http://www.openwall.com/lists/oss-security/2026/11/06/14"
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        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Apache James",
          "vendor": "Apache Software Foundation",
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              "version": "3.9.0",
              "versionType": "semver"
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      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Thanks mitchell from revampstudio.com.au for the report"
        }
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              "value": "In Apache James server prior version 3.9.1 improper Access Control List processing is exposed by the JMAP protocol which do not account for negative rules positionned by IMAP protocol.\u003cbr\u003e\u003cbr\u003eThis results in users being able to administer folders in JMAP despite having being explicitly denied the right to do so in IMAP.\u003cbr\u003e\u003cbr\u003eUsers are recommended to upgrade to version 3.9.1 which fixes this issue."
            }
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          "value": "In Apache James server prior version 3.9.1 improper Access Control List processing is exposed by the JMAP protocol which do not account for negative rules positionned by IMAP protocol.\n\nThis results in users being able to administer folders in JMAP despite having being explicitly denied the right to do so in IMAP.\n\nUsers are recommended to upgrade to version 3.9.1 which fixes this issue."
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              "text": "moderate"
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              "value": "GENERAL"
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          "descriptions": [
            {
              "cweId": "CWE-284",
              "description": "CWE-284 Improper Access Control",
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              "type": "CWE"
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        "dateUpdated": "2026-11-06T11:40:59.146Z",
        "orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
        "shortName": "apache"
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          "url": "https://lists.apache.org/thread.html/7qwsmkk88xbfq4q9o0pz9bt8p9p1yjs7"
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      "source": {
        "discovery": "UNKNOWN"
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      "title": "Apache James: Negative IMAP ACL administer authorization bypass through JMAP protocol",
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    "assignerShortName": "apache",
    "cveId": "CVE-2026-49939",
    "datePublished": "2026-11-06T11:40:59.146Z",
    "dateReserved": "2026-06-02T15:37:15.047Z",
    "dateUpdated": "2026-11-06T19:05:08.502Z",
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