CVE-2026-7221Public exploitNetwork attack vector

Internal network access via unchecked open-url request

Published Apr 28, 2026 · Updated Apr 28, 2026

SSRF in Tencent CloudBase MCP 2.17.0 and earlier allows remote attackers to make the host open arbitrary URLs through the open-url API. The unauthenticated /api/open-url handler passes req.body.url through openUrl() to the operating-system open() sink without validation or allowlisting. Exploitation requires network access to the interactive server and can reach loopback, private-network, or attacker-controlled destinations.

CVSS severity7.3
High
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in Tencent CloudBase MCP 2.17.0 and earlier allows remote attackers to make the host open arbitrary URLs through the open-url API. The unauthenticated /api/open-url handler passes req.body.url through openUrl() to the operating-system open() sink without validation or allowlisting. Exploitation requires network access to the interactive server and can reach loopback, private-network, or attacker-controlled destinations.

The record

CVE
CVE-2026-7221
Published
Apr 28, 2026
Updated
Apr 28, 2026
Vendor
Tencent
Product
CloudBase MCP
Classifications
CWE-918, CAPEC-664
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.0
  2. Affected versionversion=2.1
  3. Affected versionversion=2.10
  4. Affected versionversion=2.11
  5. Affected versionversion=2.12
  6. Affected versionversion=2.13
  7. Affected versionversion=2.14
  8. Affected versionversion=2.15
  9. Affected versionversion=2.16
  10. Affected versionversion=2.17.0
  11. Affected versionversion=2.2
  12. Affected versionversion=2.3
  13. Affected versionversion=2.4
  14. Affected versionversion=2.5
  15. Affected versionversion=2.6
  16. Affected versionversion=2.7
  17. Affected versionversion=2.8
  18. Affected versionversion=2.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Tencent · CloudBase MCPversion=2.0; version=2.1; version=2.10; version=2.11; version=2.12; version=2.13; version=2.14; version=2.15; version=2.16; version=2.17.0; version=2.2; version=2.3; version=2.4; version=2.5; version=2.6; version=2.7; version=2.8; version=2.9

Published CVSS scores

5.5VulDBCVSS: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
7.5VulDBAV:N/AC:L/Au:N/C:P/I:P/A:P
7.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
CAPEC-664Server Side Request Forgery

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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