Improper Verification of Source of a Communication Channel Affecting @paperclipai/server package, versions *
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-JS-PAPERCLIPAISERVER-19233837
- published24 Aug 2026
- disclosed21 Aug 2026
- creditsagilayani
Introduced: 21 Aug 2026
NewCVE-2026-77087 (opens in a new tab)How to fix?
There is no fixed version for @paperclipai/server.
Overview
Affected versions of this package are vulnerable to Improper Verification of Source of a Communication Channel through the local_trusted authentication middleware in server/src/middleware/auth.ts and the process adapter in server/src/adapters/process/execute.ts. An attacker can execute arbitrary commands on the victim’s machine by luring a user to open a malicious webpage that makes browser requests rebound from the attacker’s server to the local Paperclip instance. In the default local deployment, every request is treated as instance admin, so the attacker can call Paperclip’s API without credentials and trigger a company import that configures a process-based agent. When the agent is woken up, Paperclip spawns the attacker-controlled command as the OS user running the server, giving the attacker access to local files, secrets, and the ability to install backdoors.