PT-2026-29264 · Nhost · Nhost

Skoveit · Published 2026-03-31 · Updated 2026-03-31 · CVE-2026-34200

Positive Technologies (AI Summary)

CVSS v4.0

7.7

High

Base vector

AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions Nhost versions prior to 1.41.0

Description Nhost is an open source Firebase alternative with GraphQL. The Nhost CLI MCP server, when explicitly configured to listen on a network port, does not apply inbound authentication and does not enforce strict CORS. This allows a malicious website visited on the same machine to issue cross-origin requests to the MCP server and invoke privileged tools using the developer's locally configured credentials. This requires two explicit, non-default configuration steps to be exploitable. The default nhost mcp start configuration is not affected.

Recommendations Update to version 1.41.0 or later.

Exploit

Fix

Missing Authentication

Weakness Enumeration

CWE-306

CWE-942

Related Identifiers

CVE-2026-34200

GHSA-6C5X-3H35-VVW2

Affected Products

Nhost

References · 7

• 🔥 https://github.com/nhost/nhost/security/advisories/GHSA-6c5x-3h35-vvw2 · Exploit
• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34200.json · Exploit
• https://github.com/nhost/nhost/commit/15eae9285f9dce63e184b9bb24616474ffa5ccc9 · Patch
• https://github.com/nhost/nhost/pull/4060 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-34200 · Security Note
• https://osv.dev/vulnerability/CVE-2026-34200 · Vendor Advisory
• https://twitter.com/CVEnew/status/2039004450606416293 · Twitter Post