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      "text": "TuxCare License Agreement",
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        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en",
    "notes": [
      {
        "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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        "name": "Exposure of Sensitive System Information to an Unauthorized Control Sphere"
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        {
          "category": "description",
          "text": "An issue was discovered in Cyrus IMAP before 3.12.4. There is a Sieve mailbox existence oracle. An authenticated user could install a Sieve script that probed whether another user's private mailbox existed, or read the value of shared mailbox annotations, by observing which fileinto branch fired during LMTP delivery.",
          "title": "Vulnerability description"
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          "url": "https://cve.tuxcare.com/els/cve/CVE-2026-61911"
        },
        {
          "category": "external",
          "summary": "https://cyrusimap.org",
          "url": "https://cyrusimap.org/"
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        {
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          "summary": "https://www.cyrusimap.org/3.12/imap/download/release-notes/3.10/x/3.10.4.html",
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        },
        {
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          "summary": "https://www.cyrusimap.org/3.12/imap/download/release-notes/3.8/x/3.8.8.html",
          "url": "https://www.cyrusimap.org/3.12/imap/download/release-notes/3.8/x/3.8.8.html"
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      "release_date": "2026-09-09T20:18:00Z",
      "remediations": [
        {
          "category": "no_fix_planned",
          "date": "2026-09-17T14:03:01.325782Z",
          "details": "This issue is only reachable on Cyrus IMAP servers that execute Sieve during LMTP delivery and requires a valid, authenticated mailbox user who can upload/activate a Sieve script; it is not exploitable by anonymous remote attackers. ([tenable.com](https://www.tenable.com/cve/CVE-2026-61911?utm_source=openai))\nThe impact is limited to a low‑grade information disclosure oracle (detecting whether another user’s mailbox exists or reading values of shared mailbox annotations) with no effect on message contents, integrity, or availability. ([security-tracker.debian.org](https://security-tracker.debian.org/tracker/CVE-2026-61911?utm_source=openai))\nGiven these constraints, it amounts to minor intra‑domain metadata leakage rather than a path to escalation or content exfiltration, so it can be safely deprioritized relative to higher‑impact issues. ([tenable.com](https://www.tenable.com/cve/CVE-2026-61911?utm_source=openai))",
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