{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-55693",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-06-17T00:13:10.650Z",
        "datePublished": "2026-06-25T15:34:33.424Z",
        "dateUpdated": "2026-06-26T14:03:18.357Z"
    },
    "containers": {
        "cna": {
            "title": "Vim: Out-of-bounds Write in Spell File Word Count",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-787",
                            "lang": "en",
                            "description": "CWE-787: Out-of-bounds Write",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "attackVector": "LOCAL",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "privilegesRequired": "NONE",
                        "userInteraction": "ACTIVE",
                        "vulnConfidentialityImpact": "HIGH",
                        "vulnIntegrityImpact": "HIGH",
                        "vulnAvailabilityImpact": "HIGH",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 5.7,
                        "baseSeverity": "MEDIUM",
                        "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U",
                        "version": "4.0"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/vim/vim/security/advisories/GHSA-wgh4-64f7-q3jq",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/vim/vim/security/advisories/GHSA-wgh4-64f7-q3jq"
                },
                {
                    "name": "https://github.com/vim/vim/commit/a80874d9b84a01040e3d1aef2d4a59e1934dafb7",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/vim/vim/commit/a80874d9b84a01040e3d1aef2d4a59e1934dafb7"
                },
                {
                    "name": "https://github.com/vim/vim/releases/tag/v9.2.0653",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/vim/vim/releases/tag/v9.2.0653"
                }
            ],
            "affected": [
                {
                    "vendor": "vim",
                    "product": "vim",
                    "versions": [
                        {
                            "version": "< 9.2.0653",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-06-25T15:34:33.424Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Vim is an open source, command line text editor. Prior to 9.2.0653, the tree_count_words() function in src/spellfile.c fills in the word-count fields of a spell-file word trie by walking it iteratively with a depth counter. The counter is bounded only by the trie structure itself; it is never checked against the size of the fixed MAXWLEN-element stack arrays it indexes (arridx[], curi[], wordcount[]). A crafted .spl/.sug file pair, loaded when the user invokes spell suggestion, can drive the descent arbitrarily deep, so the function writes past the end of those arrays. This is a stack out-of-bounds write that corrupts the call frame and crashes the editor. This vulnerability is fixed in 9.2.0653."
                }
            ],
            "source": {
                "advisory": "GHSA-wgh4-64f7-q3jq",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-06-26T14:02:19.096753Z",
                                "id": "CVE-2026-55693",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "total"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-06-26T14:03:18.357Z"
                }
            }
        ]
    }
}