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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.

PUBLISHED Reserved 2026-04-26 | Published 2026-04-27 | Updated 2026-04-27 | Assigner VulDB




MEDIUM: 6.9CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
HIGH: 7.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
HIGH: 7.3CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
7.5AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:UR

Problem types

Server-Side Request Forgery

Product status

1.0
affected

1.1
affected

1.2
affected

1.3
affected

1.4
affected

1.5.0
affected

Timeline

2026-04-26:Advisory disclosed
2026-04-26:VulDB entry created
2026-04-26:VulDB entry last update

Credits

MidA (VulDB User) reporter

VulDB CNA Team coordinator

References

vuldb.com/vuln/359746 (VDB-359746 | JoeCastrom mcp-chat-studio LLM Models API llm.js server-side request forgery) vdb-entry technical-description

vuldb.com/vuln/359746/cti (VDB-359746 | CTI Indicators (IOB, IOC, IOA)) signature permissions-required

vuldb.com/submit/801896 (Submit #801896 | JoeCastrom mcp-chat-studio 1.5.0 Server-Side Request Forgery) third-party-advisory

github.com/JoeCastrom/mcp-chat-studio/issues/4 exploit issue-tracking

github.com/JoeCastrom/mcp-chat-studio/ product

cve.org (CVE-2026-7147)

nvd.nist.gov (CVE-2026-7147)

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