CVE-2026-18774 Server-side request forgery in hermes-agent
Remote attackers can exploit a server-side request forgery flaw in the xAI Image Generation Provider 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-2026-18774?
CVE-2026-18774 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 flaw has been found in NousResearch hermes-agent up to 0.16.0. This affects the function save_url_image of the file agent/image_gen_provider.py of the component xAI Image Generation Provider. This manipulation causes server-side request forgery. The attack may be initiated remotely. The exploit has been published 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-2026-18774?
How do I fix CVE-2026-18774?
No fix has been published for CVE-2026-18774 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-2026-18774 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-18774 exists.
Sources
Also known as GHSA-pgm4-hcxr-45qw.