What is CVE-2026-77087?

CVE-2026-77087 is a critical-severity vulnerability in Paperclipai Paperclip, classified under Missing Authorization. CVSS score: 9.6/10. Published 2026-08-21.

How severe is CVE-2026-77087?

Critical severity. CVSS v3 base score is 9.6 out of 10.

Auth bypass in Paperclipai Paperclip

CVE-2026-77087

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.

Vulnerability class: Broken Access Control

CVSS v3 metric

CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.

Affected products

Paperclipai Paperclip

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-77087?: CVE-2026-77087 is a critical-severity vulnerability in Paperclipai Paperclip, classified under Missing Authorization. CVSS score: 9.6/10. Published 2026-08-21.
How severe is CVE-2026-77087?: Critical severity. CVSS v3 base score is 9.6 out of 10.