CVE-2026-102422

CVE-2026-102422 · shell-quote `quote()` command injection via a line terminator in a token after a `{ comment }` token

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 9.2 · Critical · EPSS 0.4% · Public exploit · Fix available

Published

2026-09-29T03:47:36.376Z

Updated

2026-09-30T15:18:32.135Z

Stack: system · node

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