# CVE-2026-9277: node-shell-quote: shell-quote's `quote()` function did not validate object-token inputs against the operator model used by `parse()`

CVE-2026-9277 is fixed in 2 products on 1 platform, first by node-shell-quote 1.6.1+20160617-git72fb5a8ce29b-1ubuntu0.1~esm1, released May 22, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-9277
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0079
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 22, 2026

## Description

shell-quote's `quote()` function did not validate object-token inputs against the operator model used by `parse()`. The `.op` field was backslash-escaped character by character using `/(.)/g`, which in JavaScript does not match line terminators (\n, \r, U+2028, U+2029). A line terminator in `.op` therefore passed through unescaped into the output; POSIX shells treat a literal newline as a command separator, so any content after it would execute as a second command. The vulnerable code path is reachable in two ways: (1) direct construction of `{ op: '...\n...' }` from external input, and (2) via `parse(cmd, envFn)` when `envFn` returns object tokens whose `.op` is attacker-influenced. Both are documented API surface. Fixed by replacing the per-character escape with strict shape validation: `.op` must match the parser's control-operator allowlist; `{ op: 'glob', pattern }` validates `pattern` and forbids line terminators; `{ comment }` validates `comment` and forbids line terminators; any other object shape throws `TypeError`.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | agama-web-ui opensuse-leap 16.0 | 17+612.d8bf69336-160000.11.1 | [OPENSUSE-SU-2026:20919-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20919-1.md) | Jun 8, 2026 |
| Linux | node-shell-quote Debian 12.15 (bookworm) | 1.7.4+~1.7.1-1+deb12u1 | [DEBIAN-CVE-2026-9277](https://patchblox.com/security/data/fix/linux/debian-cve-2026-9277.md) | May 27, 2026 |
| Linux | node-shell-quote Debian 13.5 (trixie) | 1.7.4+~1.7.1-1+deb13u1 | [DEBIAN-CVE-2026-9277](https://patchblox.com/security/data/fix/linux/debian-cve-2026-9277.md) | May 27, 2026 |
| Linux | node-shell-quote Debian 14 | 1.8.4+~1.7.5-1 | [DEBIAN-CVE-2026-9277](https://patchblox.com/security/data/fix/linux/debian-cve-2026-9277.md) | May 27, 2026 |
| Linux | node-shell-quote Ubuntu 18.04.6 LTS (bionic) | 1.6.1+20160617-git72fb5a8ce29b-1ubuntu0.1~esm1 | [node-shell-quote 1.6.1+20160617-git72fb5a8ce29b-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-node-shell-quote-1.6.1-20160617-git72fb5a8ce29b-1ubuntu0.1-esm1.md) | May 22, 2026 |
| Linux | node-shell-quote Ubuntu 22.04.1 LTS (jammy) | 1.7.3+~1.7.1-1ubuntu0.1~esm1 | [node-shell-quote 1.7.3+~1.7.1-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-node-shell-quote-1.7.3-1.7.1-1ubuntu0.1-esm1.md) | May 22, 2026 |
| Linux | node-shell-quote Ubuntu 24.04.5 LTS (noble) | 1.7.4+~1.7.1-1ubuntu0.24.04.1 | [node-shell-quote 1.7.4+~1.7.1-1ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-node-shell-quote-1.7.4-1.7.1-1ubuntu0.24.04.1.md) | May 22, 2026 |
| Linux | node-shell-quote Ubuntu 25.10 (questing) | 1.7.4+~1.7.1-1ubuntu0.25.10.1 | [node-shell-quote 1.7.4+~1.7.1-1ubuntu0.25.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-node-shell-quote-1.7.4-1.7.1-1ubuntu0.25.10.1.md) | May 22, 2026 |
| Linux | node-shell-quote Ubuntu 26.04.1 LTS (resolute) | 1.8.3+~1.7.5-1ubuntu0.1~esm1 | [node-shell-quote 1.8.3+~1.7.5-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-node-shell-quote-1.8.3-1.7.5-1ubuntu0.1-esm1.md) | May 22, 2026 |

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Data as of 2026-11-08T00:53:09Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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