{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-84375",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-09-01T16:27:58.129Z",
        "datePublished": "2026-09-01T21:43:13.617Z",
        "dateUpdated": "2026-09-02T16:02:06.745Z"
    },
    "containers": {
        "cna": {
            "title": "js-yaml: maxTotalMergeKeys does not limit CPU use for empty merge sources",
            "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": "HIGH",
                        "baseScore": 7.5,
                        "baseSeverity": "HIGH",
                        "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:H",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/nodeca/js-yaml/security/advisories/GHSA-2883-xcg3-v3hh",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/nodeca/js-yaml/security/advisories/GHSA-2883-xcg3-v3hh"
                },
                {
                    "name": "https://github.com/nodeca/js-yaml/pull/797",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/nodeca/js-yaml/pull/797"
                },
                {
                    "name": "https://github.com/nodeca/js-yaml/commit/3485bc06ff8a0251505f44a00414d90df2466639",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/nodeca/js-yaml/commit/3485bc06ff8a0251505f44a00414d90df2466639"
                },
                {
                    "name": "https://github.com/nodeca/js-yaml/commit/6a8e05f9a485188ed730ac81e81ae221352ef480",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/nodeca/js-yaml/commit/6a8e05f9a485188ed730ac81e81ae221352ef480"
                },
                {
                    "name": "https://github.com/nodeca/js-yaml/commit/d90b6612a5a84385bdcb556c44578eac76dc0f6b",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/nodeca/js-yaml/commit/d90b6612a5a84385bdcb556c44578eac76dc0f6b"
                },
                {
                    "name": "https://github.com/nodeca/js-yaml/releases/tag/3.15.2",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/nodeca/js-yaml/releases/tag/3.15.2"
                },
                {
                    "name": "https://github.com/nodeca/js-yaml/releases/tag/4.3.2",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/nodeca/js-yaml/releases/tag/4.3.2"
                }
            ],
            "affected": [
                {
                    "vendor": "nodeca",
                    "product": "js-yaml",
                    "versions": [
                        {
                            "version": ">= 3.0.0, < 3.15.2",
                            "status": "affected"
                        },
                        {
                            "version": ">= 4.0.0, < 4.3.2",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-09-01T21:43:13.617Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "js-yaml is a JavaScript YAML parser and dumper. From 3.0.0 until 3.15.2 and 4.3.2, maxTotalMergeKeys in lib/js-yaml/loader.js and lib/loader.js does not count empty mapping sources while processing the merge key <<. An attacker can alias a large sequence of empty mappings into many merge targets, causing O(N * K) processing while totalMergeKeys remains unchanged and the configured resource limit is never reached. A relatively small YAML document can therefore cause prolonged CPU consumption in applications that parse untrusted YAML, and merge processing is enabled by default on these release lines. This issue is fixed in versions 3.15.2 and 4.3.2."
                }
            ],
            "source": {
                "advisory": "GHSA-2883-xcg3-v3hh",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-09-02T13:43:50.850378Z",
                                "id": "CVE-2026-84375",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-09-02T16:02:06.745Z"
                }
            }
        ]
    }
}