• Vulnerability/
  • https://reddit.com/r/cybersecurity/comments/1uheh0s/cve202652870_anthropic_mcp_python_sdk_missing/

https://reddit.com/r/cybersecurity/comments/1uheh0s/cve202652870_anthropic_mcp_python_sdk_missing/: CVE-2026-52870: Anthropic MCP Python SDK Missing Authorization Flaw

Published Jun 27, 2026
·
Updated

Affected Software

1 affected component
Anthropic Model Context Protocol Python SDK (mcp)<1.27.2
Free Weekly Intel

Don't miss critical vulnerabilities

Join thousands of security professionals who receive our weekly digest of trending CVEs, zero-days, and exploited vulnerabilities.

No spam. Unsubscribe anytime.

Frequently Asked Questions

1

What is the severity of CVE-2026-52870?

CVE-2026-52870 is classified as a high severity vulnerability due to its potential to allow unauthorized access to client tasks.

2

How do I fix CVE-2026-52870?

To fix CVE-2026-52870, implement proper authorization checks in the request handlers of the Anthropic MCP Python SDK.

3

What type of vulnerability is CVE-2026-52870?

CVE-2026-52870 is a missing authorization flaw categorized under CWE-862.

4

Who is affected by CVE-2026-52870?

Any client using the Anthropic MCP Python SDK on a shared server is potentially affected by CVE-2026-52870.

5

What can attackers do with CVE-2026-52870?

Attackers can enumerate, read, and cancel tasks belonging to other clients on the same server due to CVE-2026-52870.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203
https://reddit.com/r/cybersecurity/comments/1uheh0s/cve202652870_anthropic_mcp_python_sdk_missing/ - CVE-2026-52870: Anthropic MCP Python SDK Missing Authorization Flaw - SecAlerts