---
id: CVE-2026-102422
title: >-
  shell-quote's `quote()` function 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
summary: >-
  shell-quote's `quote()` function 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 (\n, \r, U+2028,
  U+2029) in…
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-78
product: shell-quote
affected:
  - shell-quote >= 1.8.4 < 1.11.0
published: '2026-09-29'
updated: '2026-09-29'
sourceUpdated: '2026-09-29T04:17:55.707'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-102422'
references:
  - url: 'https://github.com/ljharb/shell-quote'
    label: 7ffcee3d-2c14-4c3e-b844-86c6a321a158
  - url: >-
      https://github.com/ljharb/shell-quote/commit/6002b2ed90c6b83095eb272b6b0adaf3a172b0bc
    label: 7ffcee3d-2c14-4c3e-b844-86c6a321a158
  - url: >-
      https://github.com/ljharb/shell-quote/security/advisories/GHSA-pqg4-j6r4-53mv
    label: 7ffcee3d-2c14-4c3e-b844-86c6a321a158
  - url: 'https://www.npmjs.com/package/shell-quote'
    label: 7ffcee3d-2c14-4c3e-b844-86c6a321a158
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-29T04:27:15.487Z'
---

## Overview

shell-quote's `quote()` function 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 (\n, \r, U+2028, U+2029) in that later string therefore ends the comment, and the rest of the string is parsed as shell input: `quote(['echo', 'ok', { comment: 'x' }, 'a\nid;#'])` runs `id` in sh, bash, dash, ksh and zsh. `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. Fixed in 1.11.0: `quote()` throws a `TypeError` when a string after a `{ comment }` token contains a line terminator.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.