Vulnerability · Published Oct 30, 2026 · Assigned by GitHub_M
CVE-2026-119287Zuke: Command-form registry descriptors bypass the MCP launch policy
High 8.0
In plain English
A high-severity missing authorization in zuke from zuke-build. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 13% of all known vulnerabilities).
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| zuke-build | zuke | < 1.51.0 |
Weakness: CWE-862 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
References
- https://github.com/zuke-build/zuke/security/advisories/GHSA-2rmh-5cw4-33gr x_refsource_CONFIRM
- https://github.com/zuke-build/zuke/pull/542 x_refsource_MISC
- https://github.com/zuke-build/zuke/commit/4257b0bc5ef5e387a44f913349646d4baccd1654 x_refsource_MISC
- https://github.com/zuke-build/zuke/releases/tag/core-v1.51.0 x_refsource_MISC