brace-expansion: Zero-step sequence causes process hang and memory exhaustion_CVE-2026-33750

{
    "lastseen": "",
    "description": "The brace-expansion library generates arbitrary strings containing a common prefix and suffix. Prior to versions 5.0.5, 3.0.2, 2.0.3, and 1.1.13, a brace pattern with a zero step value (e.g., `{1..2..0}`) causes the sequence generation loop to run indefinitely, making the process hang for seconds and allocate heaps of memory. Versions 5.0.5, 3.0.2, 2.0.3, and 1.1.13 fix the issue. As a workaround, sanitize strings passed to `expand()` to ensure a step value of `0` is not used.",
    "published": "2026-03-27T14:04:52.297Z",
    "modified": "2026-03-27T14:48:06.779Z",
    "type": "cve",
    "title": "brace-expansion: Zero-step sequence causes process hang and memory exhaustion",
    "source": "GitHub_M",
    "references": "https://github.com/juliangruber/brace-expansion/security/advisories/GHSA-f886-m6hf-6m8v\nhttps://github.com/juliangruber/brace-expansion/issues/98\nhttps://github.com/juliangruber/brace-expansion/pull/95\nhttps://github.com/juliangruber/brace-expansion/pull/96\nhttps://github.com/juliangruber/brace-expansion/pull/97\nhttps://github.com/juliangruber/brace-expansion/commit/311ac0d54994158c0a384e286a7d6cbb17ee8ed5\nhttps://github.com/juliangruber/brace-expansion/commit/7fd684f89fdde3549563d0a6522226a9189472a2\nhttps://github.com/juliangruber/brace-expansion/commit/b9cacd9e55e7a1fa588fe4b7bb1159d52f1d902a\nhttps://github.com/juliangruber/brace-expansion/blob/daa71bcb4a30a2df9bcb7f7b8daaf2ab30e5794a/src/index.ts#L107-L113\nhttps://github.com/juliangruber/brace-expansion/blob/daa71bcb4a30a2df9bcb7f7b8daaf2ab30e5794a/src/index.ts#L184",
    "id": "CVE-2026-33750",
    "bulletinFamily": "",
    "cwe": [
        "CWE-400"
    ],
    "cvelist": null,
    "sourceData": "juliangruber brace-expansion >= 4.0.0, < 5.0.5\njuliangruber brace-expansion >= 3.0.0, < 3.0.2\njuliangruber brace-expansion >= 2.0.0, < 2.0.3\njuliangruber brace-expansion < 1.1.13",
    "sourceHref": "",
    "cvss": {
        "score": 6.5,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
        "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": "brace-expansion",
    "version": ">= 4.0.0, < 5.0.5",
    "vendor": "juliangruber",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}