Kanidm: Unauthenticated process abort via SCIM filter stack exhaustion_CVE-2026-46689

{
    "lastseen": "",
    "description": "Kanidm is an identity management platform. Prior to version 1.9.3, a single unauthenticated GET to any /scim/v1/... endpoint with a ?filter= query string of a few thousand nested parentheses (\u2248 4\u201312 KB) drives the recursive-descent PEG parser past the worker thread's stack guard page. Rust responds to stack overflow with std::process::abort() \u2014 the entire kanidmd process exits. The parse runs inside axum's Query<ScimEntryGetQuery> extractor, before any handler body and therefore before any ACL check. This issue has been patched in version 1.9.3.",
    "published": "2026-06-10T20:28:44.009Z",
    "modified": "2026-06-10T20:28:44.009Z",
    "type": "cve",
    "title": "Kanidm: Unauthenticated process abort via SCIM filter stack exhaustion",
    "source": "GitHub_M",
    "references": "https://github.com/kanidm/kanidm/security/advisories/GHSA-r5fr-9gmv-jggh\nhttps://github.com/kanidm/kanidm/releases/tag/v1.9.3",
    "id": "CVE-2026-46689",
    "bulletinFamily": "",
    "cwe": [
        "CWE-248",
        "CWE-400",
        "CWE-674"
    ],
    "cvelist": null,
    "sourceData": "kanidm kanidm < 1.9.3",
    "sourceHref": "",
    "cvss": {
        "score": 8.7,
        "severity": "HIGH",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
        "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": "kanidm",
    "version": "< 1.9.3",
    "vendor": "kanidm",
    "ai_description": "Unauthenticated process abort via SCIM filter stack exhaustion",
    "ai_severity": "High",
    "ai_vendor": "Kanidm",
    "ai_product": "Kanidm",
    "ai_version": "< 1.9.3",
    "ai_score": 8.7
}