Vulnerabilities in pkg:npm/shell-quote

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-pqg4-j6r4-53mv",
  "modified" : "2026-10-06T13:40:36Z",
  "published" : "2026-10-06T13:40:36Z",
  "aliases" : [ "CVE-2026-102422" ],
  "summary" : "shell-quote: `quote()` command injection via a line terminator in a token after a `{ comment }` token",
  "details" : "### Impact\n\n`quote()` emits a `{ comment }` token as `#` followed by its text, which comments out the rest of the shell line, including the opening quote of any later string token. A line terminator in that later string ends the comment, and the rest of the string is parsed as shell input:\n\n```js\nquote(['echo', 'ok', { comment: 'x' }, 'a\\nid;#']);\n// echo ok #x 'a\n// id;#'\n```\n\nPassed to `sh`, `bash`, `dash`, `ksh`, or `zsh`, this runs `id`.\n\n`parse()` emits a comment token for a `#` in the middle of a word (for example `http://example.com/#frag`), so callers that combine `parse()` output with another untrusted string, such as `quote(parse(untrustedCommand).concat(untrustedArg))`, are affected. The fix for CVE-2026-9277 rejected line terminators in the comment's own text, but not in the tokens after it.\n\nExploitation requires an attacker-controlled string containing a line terminator that follows a `{ comment }` token in the same `quote()` call.\n\n### Patches\n\nFixed in v1.11.0: `quote()` throws a `TypeError` when a string after a `{ comment }` token contains a line terminator (`\\n`, `\\r`, U+2028, or U+2029).\n\n### Workarounds\n\nDrop every token after a `{ comment }` token before calling `quote()`, or reject line terminators in untrusted strings. Separately, do not append other shell text after `quote()` output that contains a comment, since the comment swallows it.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "shell-quote"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.8.4"
      }, {
        "fixed" : "1.11.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/ljharb/shell-quote/security/advisories/GHSA-pqg4-j6r4-53mv"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-102422"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/ljharb/shell-quote/commit/6002b2ed90c6b83095eb272b6b0adaf3a172b0bc"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/ljharb/shell-quote"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-78" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-10-06T13:40:36Z",
    "nvd_published_at" : "2026-09-29T04:17:55Z"
  }
}