# CVE-2026-119287: Zuke: Command-form registry descriptors bypass the MCP launch policy

Status: published. Published: 2026-10-30. Updated: 2026-11-04.

Zuke is a code-first, strongly typed build automation system for Deno. Prior to 1.51.0, the @zuke/core MCP registry mode accepts command-form registry descriptors without applying the ZUKE_REGISTRY_LAUNCH_HOSTS authorization enforced for remote module descriptors. When zuke mcp --registry --allow-run reads a registry writable by another party and a run-capable caller invokes the affected tool, the registry writer can choose the program and arguments executed with the operator's environment and workspace access. The --allow-run and --protect name globs do not contain the issue because the descriptor supplies those names, and the optional destructive confirmation displays a description controlled by the same writer. The local default registry populated only through zuke register is not affected because that command writes module-form descriptors. This issue is fixed in version 1.51.0.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- zuke-build / zuke: < 1.51.0 (affected). Source: CNA: GitHub_M

## Severity and prioritization

- CVSS 3.1: 8 (high); CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H; source: CNA: GitHub_M

- CVSS 3.1: 8 (high); CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H; source: NVD: security-advisories@github.com

- CISA KEV: No listing in collected sources

- EPSS: 0.22% as of 2026-11-04; percentile 13.00%

- SSVC: exploitation none; automatable no; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-862

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/zuke-build/zuke/security/advisories/GHSA-2rmh-5cw4-33gr (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/zuke-build/zuke/pull/542 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/zuke-build/zuke/commit/4257b0bc5ef5e387a44f913349646d4baccd1654 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/zuke-build/zuke/releases/tag/core-v1.51.0 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/zuke-build/zuke/commit/4257b0bc5ef5e387a44f913349646d4baccd1654 (security-advisories@github.com)

- https://github.com/zuke-build/zuke/pull/542 (security-advisories@github.com)

- https://github.com/zuke-build/zuke/releases/tag/core-v1.51.0 (security-advisories@github.com)

- https://github.com/zuke-build/zuke/security/advisories/GHSA-2rmh-5cw4-33gr (security-advisories@github.com)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-119287; retrieved 2026-11-04; source updated 2026-11-04

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-119287; retrieved 2026-11-05; source updated 2026-11-04

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-119287; retrieved 2026-11-04; source updated Not reported

Revision: 1e7368d564689e0eca00efe631ea74c7788b41fbfb95c85a4b7434cd81d01f99

Canonical: https://y2.dev/cve/CVE-2026-119287

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