What is CVE-2026-7221?

CVE-2026-7221 is a high-severity vulnerability in Tencentcloudbase Cloudbase-Mcp, classified under Server-Side Request Forgery (SSRF). CVSS score: 7.3/10. Published 2026-04-28.

How severe is CVE-2026-7221?

High severity. CVSS v3 base score is 7.3 out of 10.

SSRF in Tencentcloudbase Cloudbase-Mcp

CVE-2026-7221

A vulnerability was found in TencentCloudBase CloudBase-MCP up to 2.17.0. Affected is the function openUrl of the file mcp/src/interactive-server.ts of the component open-url API Endpoint. The manipulation of the argument req.body.url results in server-side request forgery. It is possible to launch the attack remotely. The exploit has been made public and could be used. Upgrading to version 2.17.1 is able to address this issue. The patch is identified as 3f678a1e7bd400cd76469d61024097d4920dc6b5. It is recommended to upgrade the affected component.

Vulnerability class: SSRF (Server-Side Request Forgery)

Published 2026-04-28 · last modified 2026-07-24.

CVSS v3 metric

CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.005 (41.5th percentile), scored 2026-10-06.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 41.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.002

Affected products

Tencentcloudbase Cloudbase-Mcp — versions 2.0, 2.1, 2.2

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

vuldb.com/vuln/359821 (technical-description, vdb-entry)
vuldb.com/vuln/359821/cti (signature, permissions-required)
vuldb.com/submit/802230 (third-party-advisory)
github.com/TencentCloudBase/CloudBase-MCP/issues/509 (issue-tracking, exploit)
github.com/TencentCloudBase/CloudBase-MCP/pull/510 (issue-tracking, patch)
github.com/TencentCloudBase/CloudBase-MCP/commit/3f678a1e7bd400cd76469d61024097… (patch)
github.com/TencentCloudBase/CloudBase-MCP/releases/tag/v2.17.1 (patch)
github.com/TencentCloudBase/CloudBase-MCP/ (product)

Frequently asked questions

What is CVE-2026-7221?: CVE-2026-7221 is a high-severity vulnerability in Tencentcloudbase Cloudbase-Mcp, classified under Server-Side Request Forgery (SSRF). CVSS score: 7.3/10. Published 2026-04-28.
How severe is CVE-2026-7221?: High severity. CVSS v3 base score is 7.3 out of 10.