CVE-2026-7147 JoeCastrom mcp-chat-studio LLM Models API llm.js server-side request forgery
Attackers can exploit a server-side request forgery vulnerability in the LLM Models API to access internal resources or bypass security controls.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-7147?
CVE-2026-7147 is a medium-severity server-side request forgery vulnerability in JoeCastrom mcp-chat-studio, published on 27 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability was detected in JoeCastrom mcp-chat-studio up to 1.5.0. Affected by this issue is some unknown functionality of the file server/routes/llm.js of the component LLM Models API. Performing a manipulation of the argument req.query.base_url results in server-side request forgery. Remote exploitation of the attack is possible. The exploit is now public and may be used. The project was informed of the problem early through an issue report but has not responded yet.
Weakness: CWE-918
Which versions are affected by CVE-2026-7147?
How do I fix CVE-2026-7147?
No fix has been published for CVE-2026-7147 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-2026-7147 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-7147 exists.
Sources
Also known as GHSA-jcpj-r94h-977w.