Paperclip: Arbitrary File Read via Agent-Controlled adapterConfig.instructionsFilePath

Exploitation

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

CVSS

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

EPSS

No dated EPSS signal available.

As published by the source; long descriptions are shortened.

Summary Paperclip contains an arbitrary file read vulnerability that allows an attacker with an Agent API key to read files from the Paperclip server host filesystem. The vulnerability occurs because agents are allowed to modify their own adapterConfig through the /agents/:id API endpoint. The configuration field adapterConfig.instructionsFilePath is later read directly by the server runtime using fs.readFile(). Because no validation or path restriction is applied, an attacker can supply an arbitrary filesystem path. The Paperclip server then attempts to read that path from the host filesystem during agent execution. This breaks the intended trust boundary between agent runtime configuration and server host filesystem access, allowing a compromised or malicious agent to access sensitive files on the host system. Details Root Cause No path normalization, allowlist, or workspace boundary validation is applied before the filesystem read occurs. Agent configuration can be modified…

Published by the source

16 Apr 2026, 22:45 UTC

Last modified by the source

16 Apr 2026, 23:03 UTC

Source last checked

26 Oct 2026, 12:48 UTC

1. Revision 2 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-3pw3-v88x-xj24

2. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-3pw3-v88x-xj24

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# Patch Next advisory brief: GHSA-3pw3-v88x-xj24

Advisory: Paperclip: Arbitrary File Read via Agent-Controlled adapterConfig.instructionsFilePath
IDs: GHSA-3pw3-v88x-xj24
Record: https://patchnext.com/advisories/ghsa-3pw3-v88x-xj24 (revision 2, source checked 26 Oct 2026, 12:48 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.5)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: @paperclipai/shared 2026.416.0. A vendor fix does not mean a deployment is fixed.

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

## Suggested inspection (read-only)
- `npm ls @paperclipai/shared --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/shared.
- 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-3pw3-v88x-xj24 (OSV record GHSA-3pw3-v88x-xj24 lists affected ranges: npm @paperclipai/shared >=0 <2026.416.0 (fixed))
- Verified: https://github.com/advisories/GHSA-3pw3-v88x-xj24 (GitHub-reviewed advisory GHSA-3pw3-v88x-xj24 lists affected ranges: npm @paperclipai/shared >=0 <2026.416.0)

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