Vulnerability · Published Sep 29, 2026 · Assigned by harborist
CVE-2026-102422shell-quote `quote()` command injection via a line terminator in a token after a `{ comment }` token
High 8.1
In plain English
A high-severity OS command injection in shell-quote. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 32% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | node-shell-quote | no fix listed | DEBIAN-CVE-2026-102422 |
| Debian:13 | node-shell-quote | 1.7.4+~1.7.1-1+deb13u2 | DEBIAN-CVE-2026-102422 |
| Debian:14 | node-shell-quote | 1.12.0-1 | DEBIAN-CVE-2026-102422 |
| Ubuntu:24.04:LTS | node-shell-quote | no fix listed | UBUNTU-CVE-2026-102422 |
| Ubuntu:26.10 | node-shell-quote | no fix listed | UBUNTU-CVE-2026-102422 |
| npm | shell-quote | 1.11.0 | GHSA-pqg4-j6r4-53mv |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| shell-quote | 1.8.4 – before 1.11.0 |
Weakness: CWE-78 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
References
- GHSA-pqg4-j6r4-53mv vendor-advisory
- Fix commit patch
- https://github.com/ljharb/shell-quote product
- https://www.npmjs.com/package/shell-quote product