{"id":"CVE-2026-102422","aliases":["GHSA-pqg4-j6r4-53mv"],"url":"https://o3.security/vulnerability/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.","published":"2026-09-29T03:47:36.376Z","modified":"2026-10-21T02:54:29.354162638Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"npm","name":"shell-quote","fixedVersion":"1.11.0"}],"fix":{"url":"https://github.com/ljharb/shell-quote/commit/6002b2ed90c6b83095eb272b6b0adaf3a172b0bc","label":"ljharb/shell-quote@6002b2e"},"references":[{"type":"WEB","url":"https://www.npmjs.com/package/shell-quote"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102422.json"},{"type":"ADVISORY","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":"FIX","url":"https://github.com/ljharb/shell-quote/commit/6002b2ed90c6b83095eb272b6b0adaf3a172b0bc"},{"type":"PACKAGE","url":"https://github.com/ljharb/shell-quote"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-21T02:54:29.354162638Z"}}