CVE-2026-18775 NousResearch hermes-agent Browser Tooling browser_tool.py browser_snapshot server-side request forgery
Remote attackers can exploit a server-side request forgery flaw in the browser tooling to access internal resources or bypass security controls.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-18775?
CVE-2026-18775 is a medium-severity server-side request forgery vulnerability in NousResearch hermes-agent, published on 4 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability has been found in NousResearch hermes-agent up to 0.16.0. This vulnerability affects the function browser_snapshot of the file tools/browser_tool.py of the component Browser Tooling. Such manipulation leads to server-side request forgery. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Weakness: CWE-918
Which versions are affected by CVE-2026-18775?
How do I fix CVE-2026-18775?
No fix has been published for CVE-2026-18775 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-2026-18775 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-18775 exists.
Sources
Also known as GHSA-4294-5q8h-pq8p.