CVE-2026-45609

Description

Spring AI MCP Security: Unvalidated URL Fetching (SSRF)

Overview

State

—

Assigner (CNA)

—

CVSS severity

high

CVSS score

7.2 / 10

CVSS vector

AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Effective score

7.2 / 10 HIGH source: CNA overview

CWE(s)

—

Reserved

—

Published

—

Last updated

—

Source

https://www.tenable.com/cve/CVE-2026-45609

Linked Threat

CVE-2026-45609 — CVE-2026-45609

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID

EUVD-2026-33323

EUVD enrichment is queued; refresh the page in a few seconds.

Vendor references (0)

References embedded in the original CVE record by the assigning CNA.

None in the CVE record.

Web references (4)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

• https://github.com/spring-ai-community/mcp-security/security/advisories/GHSA-qjp4-4jvr-xqg3 tenable:github.com
• https://www.first.org/epss/ tenable:www.first.org
• https://nvd.nist.gov/vuln/detail/CVE-2026-45609 tenable:nvd.nist.gov
• https://www.cve.org/CVERecord?id=CVE-2026-45609 tenable:www.cve.org

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

• Microsoft and Adobe Patch Tuesday, April 2026 Security Update Review
  web:blog.qualys.com

  With Qualys Policy Audit's out-of-the-box mitigation or Compensatory Controls, which reduce the risk of a vulnerability being exploited because the remediation ( fix / patch ) cannot be done immediately, these security controls are not recommended by any industry standards, such as CIS and DISA-STIG.

  2026-05-26 02:54 UTC
• CISA Warns of Exploited Microsoft Defender 0-Day Flaws
  web:cyberpress.org

  The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added two actively exploited Microsoft Defender vulnerabilities to its Known Exploited Vulnerabilities (KEV) catalog, issuing an urgent remediation directive for federal agencies with a due date of June 3, 2026 .

  2026-05-26 02:54 UTC
• Spring AI MCP Security: Unvalidated URL Fetching (SSRF)
  web:github.com

  Summary The mcp-security framework fails to implement the mandatory SSRF mitigations outlined in the Model Context Protocol (MCP) security specifications. Specifically, it processes untrusted URLs for OAuth-related discovery and metadata without verifying if the targets are malicious or internal to the network. This only affects installations with Dynamic Client Registration (DCR) enabled:

  2026-05-26 02:54 UTC
• Patch Tuesday, April 2026 Edition - Krebs on Security
  web:krebsonsecurity.com

  For a clickable, per- patch breakdown, check out the SANS Internet Storm Center Patch Tuesday roundup. Running into problems applying any of these updates?

  2026-05-26 02:54 UTC
• Security Update Guide - Microsoft
  web:portal.msrc.microsoft.com

  The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.

  2026-05-26 02:54 UTC
• Microsoft April 2026 Patch Tuesday fixes 167 flaws, 2 zero-days
  web:www.bleepingcomputer.com

  Today is Microsoft's April 2026 Patch Tuesday with security updates for 167 flaws, including 2 zero-day vulnerabilities.

  2026-05-26 02:54 UTC
• April 2026 Patch Tuesday: Updates and Analysis | CrowdStrike
  web:www.crowdstrike.com

  Microsoft's April 2026 Patch Tuesday addresses 164 CVEs , featuring 8 Critical vulnerabilities, one exploited zero-day, and one disclosed zero-day.

  2026-05-26 02:54 UTC
• Microsoft Confirms Active 0-Day Exploit—Check Emergency Mitigation
  web:www.forbes.com

  Updated May 17: This article, originally published May 16, has been updated to include further details on the emergency mitigation process recommended after the CVE - 2026 -42897 Microsoft Exchange ...

  2026-05-26 02:54 UTC
• Microsoft April 2026 Patch Tuesday fixes 167 ... - Notebookcheck
  web:www.notebookcheck.net

  Microsoft April 2026 Patch Tuesday fixes 167 vulnerabilities, including an actively exploited SharePoint zero-day. Windows 11 KB5083769 and KB5082052 bring new builds and RDP security.

  2026-05-26 02:54 UTC
• Microsoft fixes 167 security flaws in April, second biggest Patch ...
  web:www.pcworld.com

  This month's Patch Tuesday includes an actively exploited Office zero-day vulnerability and several critical RCE bugs in Windows and Remote Desktop.

  2026-05-26 02:54 UTC

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