Outline: Slack OAuth state can link a victim Outline account to an attacker Slack identity_CVE-2026-44695

{
    "lastseen": "",
    "description": "Outline is a service that allows for collaborative documentation. Prior to 1.7.1, the Slack integration callback for GET /auth/slack.post accepts an unsigned, session-independent OAuth state value. A third party who can obtain a Slack OAuth code for the same Outline Slack client can make a logged-in Outline user complete the callback and link that user's Outline account to the attacker's Slack team_id and user_id. The linked Slack identity can then use the Slack /outline search command as the victim Outline user. This vulnerability is fixed in 1.7.1.",
    "published": "2026-05-11T21:11:25.679Z",
    "modified": "2026-05-11T21:11:25.679Z",
    "type": "cve",
    "title": "Outline: Slack OAuth state can link a victim Outline account to an attacker Slack identity",
    "source": "GitHub_M",
    "references": "https://github.com/outline/outline/security/advisories/GHSA-mjgw-5j7q-gv8v",
    "id": "CVE-2026-44695",
    "bulletinFamily": "",
    "cwe": [
        "CWE-352"
    ],
    "cvelist": null,
    "sourceData": "outline outline < 1.7.1",
    "sourceHref": "",
    "cvss": {
        "score": 5.8,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:N/A:N",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "outline",
    "version": "< 1.7.1",
    "vendor": "outline",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}