{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:vim:vim:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "9.2.0653"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "CPE_RANGE",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "a80874d9b84a01040e3d1aef2d4a59e1934dafb7"
            }
          ],
          "repo": "https://github.com/vim/vim",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-wgh4-64f7-q3jq"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-787"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55693.json"
  },
  "details": "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.",
  "id": "CVE-2026-55693",
  "modified": "2026-07-08T05:36:20.449336806Z",
  "published": "2026-06-25T15:34:33.424Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/vim/vim/releases/tag/v9.2.0653"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55693.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/vim/vim/security/advisories/GHSA-wgh4-64f7-q3jq"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-55693"
    },
    {
      "type": "FIX",
      "url": "https://github.com/vim/vim/commit/a80874d9b84a01040e3d1aef2d4a59e1934dafb7"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Vim: Out-of-bounds Write in Spell File Word Count"
}