Grackle has command/argument injection in the git worktree executor that enables RCE on provisioned hosts via an unsanitized task branch name (shell:true)

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS 4.0

8.7 · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N · score source

EPSS

No dated EPSS signal available.

As published by the source; long descriptions are shortened.

Summary The default git executor used for all worktree operations spawns git through a shell, and the untrusted task branch name flows into the command unsanitized. A caller able to reach the PowerLine SpawnSession RPC (a malicious or compromised agent acting through the orchestration layer, or any client able to spawn a task) can achieve arbitrary command execution as the PowerLine user on every provisioned environment (SSH host, Docker container, or Codespace), escaping the agent sandbox. This advisory bundles two related defects in worktree.ts (audit findings F1 and F13). Affected versions @grackle-ai/runtime-sdk (and reachable via @grackle-ai/powerline) at version 0.132.1 and earlier. All publishable packages are lockstep-versioned. F1 — Command injection via shell:true (primary, High) Location: packages/runtime-sdk/src/worktree.ts:22-28 (sink), :135-143 (branch → args). Source: packages/powerline/src/grpc-server.ts:112 (req.branch),…

Published by the source

2 Jul 2026, 19:16 UTC

Last modified by the source

10 Sep 2026, 03:51 UTC

Source last checked

26 Oct 2026, 12:56 UTC

1. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-vv65-f55v-xm6g

2. Revision 2 · amended · 25 Oct 2026

   Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

3. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-vv65-f55v-xm6g

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# Patch Next advisory brief: GHSA-vv65-f55v-xm6g

Advisory: Grackle has command/argument injection in the git worktree executor that enables RCE on provisioned hosts via an unsanitized task branch name (shell:true)
IDs: GHSA-vv65-f55v-xm6g
Record: https://patchnext.com/advisories/ghsa-vv65-f55v-xm6g (revision 3, source checked 26 Oct 2026, 12:56 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 8.7)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor response not established. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm @grackle-ai/runtime-sdk: affected <= 0.132.1
- npm @grackle-ai/powerline: affected <= 0.132.1

## Suggested inspection (read-only)
- `npm ls @grackle-ai/runtime-sdk --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.
- `npm ls @grackle-ai/powerline --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.

## Supported action
No complete vendor fix is recorded. Follow the primary source's mitigation guidance and check this record again before closing anything.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on @grackle-ai/runtime-sdk, @grackle-ai/powerline.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-vv65-f55v-xm6g (OSV record GHSA-vv65-f55v-xm6g lists affected ranges: npm @grackle-ai/runtime-sdk >=0 =0 <=0.132.1)
- Verified: https://github.com/advisories/GHSA-vv65-f55v-xm6g (GitHub-reviewed advisory GHSA-vv65-f55v-xm6g lists affected ranges: npm @grackle-ai/runtime-sdk >=0 =0 <=0.132.1)

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