Paperclip: OS Command Injection via Execution Workspace cleanupCommand

Exploitation

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

CVSS

9.8 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

• CVE-2026-119713: 0.80% estimated exploitation activity in the next 30 days; percentile 56.56 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

| Field | Value | |-------|-------| | Affected Software | Paperclip AI v2026.403.0 | | Affected Component | Execution Workspace lifecycle (`workspace-runtime.ts`) | | Affected Endpoint | `PATCH /api/execution-workspaces/:id` | | Deployment Modes | All — `local_trusted` (zero auth), `authenticated` (any company user) | | Platforms | Linux, macOS, Windows (with Git installed) | | Date | 2026-04-13 | ---

Executive Summary A critical OS command injection vulnerability exists in Paperclip's execution workspace lifecycle. An attacker can inject arbitrary shell commands into the `cleanupCommand` field via the `PATCH /api/execution-workspaces/:id` endpoint. When the workspace is archived, the server executes this command verbatim via `child_process.spawn(shell, ["-c", cleanupCommand])` with no input validation or sanitization. In `local_trusted` mode (the default for desktop installations), this requires zero authentication. Three independent proofs of exploitation…

Published by the source

16 Apr 2026, 22:48 UTC

Last modified by the source

31 Oct 2026, 02:56 UTC

Source last checked

31 Oct 2026, 06:00 UTC

1. Revision 4 · amended · 31 Oct 2026

   Amended from osv record GHSA-vr7g-88fq-vhq3

2. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-vr7g-88fq-vhq3

3. Revision 2 · amended · 24 Oct 2026

   Amended from osv record GHSA-vr7g-88fq-vhq3

4. Revision 1 · created · 23 Oct 2026

   Published from ghsa record GHSA-vr7g-88fq-vhq3

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# Patch Next advisory brief: CVE-2026-119713

Advisory: Paperclip: OS Command Injection via Execution Workspace cleanupCommand
IDs: CVE-2026-119713, GHSA-vr7g-88fq-vhq3
Record: https://patchnext.com/advisories/ghsa-vr7g-88fq-vhq3 (revision 4, source checked 31 Oct 2026, 06:00 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Critical (CVSS 9.8)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: @paperclipai/server 2026.416.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm @paperclipai/server: affected < 2026.416.0; fixed in 2026.416.0

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

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on @paperclipai/server.
- 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://github.com/advisories/GHSA-vr7g-88fq-vhq3 (GitHub-reviewed advisory GHSA-vr7g-88fq-vhq3 lists affected ranges: npm @paperclipai/server >=0 <2026.416.0)
- Verified: https://osv.dev/vulnerability/GHSA-vr7g-88fq-vhq3 (OSV record GHSA-vr7g-88fq-vhq3 lists affected ranges: npm @paperclipai/server >=0 <2026.416.0 (fixed))

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