CVE-2026-77087 Paperclip before 0.3.1 Remote Code Execution via DNS Rebinding
Attackers can execute arbitrary commands on a developer's machine via DNS rebinding due to missing Host header validation in Paperclip.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-77087?
CVE-2026-77087 is a critical server-side request forgery vulnerability in paperclipai paperclip, published on 21 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-862
Which versions are affected by CVE-2026-77087?
How do I fix CVE-2026-77087?
No fix has been published for CVE-2026-77087 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-77087 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-77087 exists.
Sources
Also known as GHSA-gwmj-hf32-5v8v, GHSA-x8hx-rhr2-9rf7.