Discourse: Unauthorized channel membership inference via excluded_memberships_channel_id_CVE-2026-32618

{
    "lastseen": "",
    "description": "Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, there is possible channel membership inference from chat user search without authorization. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.",
    "published": "2026-03-31T17:40:41.484Z",
    "modified": "2026-04-03T16:20:00.471Z",
    "type": "cve",
    "title": "Discourse: Unauthorized channel membership inference via excluded_memberships_channel_id",
    "source": "GitHub_M",
    "references": "https://github.com/discourse/discourse/security/advisories/GHSA-pc8p-w2m7-hgf3\nhttps://github.com/discourse/discourse/commit/81fd89e744058e509412158e5e6ac90c856ade64",
    "id": "CVE-2026-32618",
    "bulletinFamily": "",
    "cwe": [
        "CWE-200"
    ],
    "cvelist": null,
    "sourceData": "discourse discourse >= 2026.1.0-latest, < 2026.1.3\ndiscourse discourse >= 2026.2.0-latest, < 2026.2.2\ndiscourse discourse >= 2026.3.0-latest, < 2026.3.0",
    "sourceHref": "",
    "cvss": {
        "score": 4.3,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
        "version": "3.1"
    },
    "cvss2": [],
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        "baseScore": 0,
        "baseSeverity": "",
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        "privilegesRequired": "",
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        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
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    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "discourse",
    "version": ">= 2026.1.0-latest, < 2026.1.3",
    "vendor": "discourse",
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    "ai_score": 0
}