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Vulnerability record · CVE-2026-77087 · published 21 August 2026

CVE-2026-77087: Missing authorization vulnerability

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.

9.4 CVSS 4.0 Critical EPSS 0.49% · top 60.6% CWE-862 · Missing authorization Deferred
9.4CVSS 4.0 base score
0.49%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
24 Sep 2026Last modified by NVD

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.

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

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

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Source: NIST National Vulnerability Database (record CVE-2026-77087), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.