{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-102277",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-09-28T20:11:16.659Z",
        "datePublished": "2026-09-28T20:54:46.160Z",
        "dateUpdated": "2026-09-28T20:54:46.160Z"
    },
    "containers": {
        "cna": {
            "title": "brace-expansion: Quadratic-time expansion of the `{a},b}` rewrite causes CPU denial of service",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-400",
                            "lang": "en",
                            "description": "CWE-400: Uncontrolled Resource Consumption",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-407",
                            "lang": "en",
                            "description": "CWE-407: Inefficient Algorithmic Complexity",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "LOW",
                        "baseScore": 5.3,
                        "baseSeverity": "MEDIUM",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "NONE",
                        "privilegesRequired": "NONE",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/juliangruber/brace-expansion/security/advisories/GHSA-q2hr-2g5m-vwhr",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/juliangruber/brace-expansion/security/advisories/GHSA-q2hr-2g5m-vwhr"
                },
                {
                    "name": "https://github.com/juliangruber/brace-expansion/commit/33a5ef17b8d800bbfa8c52b14c39043b6aac1a96",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/juliangruber/brace-expansion/commit/33a5ef17b8d800bbfa8c52b14c39043b6aac1a96"
                },
                {
                    "name": "https://github.com/juliangruber/brace-expansion/commit/bdff773f98e5988616b7039cc9b508df5d640b22",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/juliangruber/brace-expansion/commit/bdff773f98e5988616b7039cc9b508df5d640b22"
                },
                {
                    "name": "https://github.com/juliangruber/brace-expansion/commit/c55e67d8d8b1c56a2474afff15c2891166b2d364",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/juliangruber/brace-expansion/commit/c55e67d8d8b1c56a2474afff15c2891166b2d364"
                },
                {
                    "name": "https://github.com/juliangruber/brace-expansion/commit/ffdfa3e3806bed17c0874b8f1439b084de354a7e",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/juliangruber/brace-expansion/commit/ffdfa3e3806bed17c0874b8f1439b084de354a7e"
                }
            ],
            "affected": [
                {
                    "vendor": "juliangruber",
                    "product": "brace-expansion",
                    "versions": [
                        {
                            "version": ">= 4.0.0, < 5.0.12",
                            "status": "affected"
                        },
                        {
                            "version": ">= 3.0.0, < 3.0.9",
                            "status": "affected"
                        },
                        {
                            "version": ">= 2.0.0, < 2.1.7",
                            "status": "affected"
                        },
                        {
                            "version": "< 1.1.21",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-09-28T20:54:46.160Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "The brace-expansion library generates arbitrary strings containing a common prefix and suffix. Prior to 1.1.21, 2.1.7, 3.0.9, and 5.0.12, the expand function handles untrusted {a},b}-shaped patterns with many trailing closing braces by restarting its scan once for each trailing closing brace. The successive full-input rescans with linear working-string growth cause quadratic CPU time and memory pressure that can block the Node.js event loop. The process eventually recovers, making the impact a recoverable CPU denial of service. This issue is fixed in versions 1.1.21, 2.1.7, 3.0.9, and 5.0.12."
                }
            ],
            "source": {
                "advisory": "GHSA-q2hr-2g5m-vwhr",
                "discovery": "UNKNOWN"
            }
        }
    }
}