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.