HyperCloud Improper Refresh Token Validation and Access Token Invalidation Allows Long-Term Unauthorized Access_CVE-2026-1842

{
    "lastseen": "",
    "description": "HyperCloud versions 2.3.5 through 2.6.8 improperly allowed refresh tokens to be used directly for resource access and failed to invalidate previously issued access tokens when a refresh token was used. Because refresh tokens have a significantly longer lifetime (default one year), an authenticated client could use a refresh token in place of an access token to maintain long-term access without token rotation. Additionally, old access tokens remained valid after refresh, enabling concurrent or extended use beyond intended session boundaries. This vulnerability could allow prolonged unauthorized access if a token is disclosed.",
    "published": "2026-02-20T16:23:16.498Z",
    "modified": "2026-02-20T16:23:16.498Z",
    "type": "cve",
    "title": "HyperCloud Improper Refresh Token Validation and Access Token Invalidation Allows Long-Term Unauthorized Access",
    "source": "SoftIron",
    "references": "https://advisories.softiron.cloud/",
    "id": "CVE-2026-1842",
    "bulletinFamily": "",
    "cwe": [
        "CWE-613"
    ],
    "cvelist": null,
    "sourceData": "SoftIron HyperCloud 2.3.5",
    "sourceHref": "",
    "cvss": {
        "score": 6.2,
        "severity": "MEDIUM",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U",
        "version": "4.0"
    },
    "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": "HyperCloud",
    "version": "2.3.5",
    "vendor": "SoftIron",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}