Vulnerabilities in pkg:golang/github.com/apache/skywalking-mcp

PACKAGE
Advisory Identifier: GHSA-c4hg-6933-x62x
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Advisory Summary

CVE-2026-34476 is a HIGH (CVSS 7.1) server-side request forgery vulnerability (CWE-918: Server-Side Request Forgery (SSRF)) affecting Apache SkyWalking MCP libraries in the Go ecosystem. The issue involves server-side request forgery via sw-url header in mcp server. Remediation is available by upgrading affected packages to version 0.2.0.

1 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:golang/github.com/apache/skywalking-mcp

1 Known Advisory Record(s)

Vulnerability advisories affecting package pkg:golang/github.com/apache/skywalking-mcp. Select an advisory below to view technical details or fixes.

Advisory ID CVE / NVD Severity Summary
GHSA-c4hg-6933-x62x CVE-2026-34476 HIGH Apache SkyWalking MCP: Server-Side Request Forgery via SW-URL Header in MCP Server

CVE-2026-34476 at a Glance

CVE Identifier CVE-2026-34476
GHSA Identifier GHSA-c4hg-6933-x62x
Severity HIGH
CVSS v3.1 Base Score 7.1
CWE Classification CWE-918: Server-Side Request Forgery (SSRF)
Affected Product Apache SkyWalking MCP
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 7.1

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2026-34476

To remediate this vulnerability, upgrade all affected Apache SkyWalking MCP dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

github.com/apache/skywalking-mcp fixed: 0.2.0 
Upgrade github.com/apache/skywalking-mcp to 0.2.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for github.com/apache/skywalking-mcp

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-34476, inspect your project dependencies for Apache SkyWalking MCP:

inspect dependencies for github.com/apache/skywalking-mcp

Analyze the terminal output to locate any version of Apache SkyWalking MCP in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.2.0), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-918: Server-Side Request Forgery (SSRF), where the web server receives a url or similar request from an upstream component and retrieves the contents of this url, but it does not sufficiently ensure that the request is being sent to the expected destination. In Apache SkyWalking MCP, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

Server-Side Request Forgery via SW-URL Header vulnerability in Apache SkyWalking MCP. This issue affects Apache SkyWalking MCP: 0.1.0. Users are recommended to upgrade to version 0.2.0, which fixes this issue.

CVE-2026-34476 Affected Apache SkyWalking MCP Versions

1 component(s)
Fixed Versions:
0.2.0
Product / Package Ecosystem Affected Versions Fixed Version
github.com/apache/skywalking-mcp
golang/github.com/apache/skywalking-mcp
Go
< 0.2.0
0.2.0

References

NVD — CVE-2026-34476 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-34476
GitHub Advisory / Wiki ADVISORY
https://github.com/advisories/GHSA-c4hg-6933-x62x
Apache SkyWalking MCP Source Repository REPOSITORY
https://github.com/apache/skywalking-mcp
lists.apache.org/thread/v0k1xyzzbtnp... WEB
https://lists.apache.org/thread/v0k1xyzzbtnpyrwxwyn36pbspr8rhjnr
Apache SkyWalking MCP Security Information SECURITY
http://www.openwall.com/lists/oss-security/2026/04/13/4

Frequently Asked Questions

What is CVE-2026-34476?
CVE-2026-34476 is a security vulnerability in Apache SkyWalking MCP involving Server-Side Request Forgery via SW-URL Header in MCP Server under CWE-918: Server-Side Request Forgery (SSRF).
Which Apache SkyWalking MCP versions are affected?
Affected versions include releases prior to 0.2.0 across affected packages: github.com/apache/skywalking-mcp.
What version fixes CVE-2026-34476?
Upgrading to 0.2.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/apache/skywalking-mcp affected?
Yes, github.com/apache/skywalking-mcp is affected in releases prior to 0.2.0. Upgrade your dependency to 0.2.0 or later.
What is the CVSS score of CVE-2026-34476?
CVE-2026-34476 has a CVSS v3.1 base score of 7.1 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N.
What CWE is associated with CVE-2026-34476?
CVE-2026-34476 is classified under CWE-918: Server-Side Request Forgery (SSRF) (The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.).
How can I check Go dependencies for CVE-2026-34476?
Run the dependency tree command: 'inspect dependencies for github.com/apache/skywalking-mcp'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-c4hg-6933-x62x",
  "modified" : "2026-07-21T13:56:29Z",
  "published" : "2026-04-13T15:31:41Z",
  "aliases" : [ "CVE-2026-34476" ],
  "summary" : "Apache SkyWalking MCP: Server-Side Request Forgery via SW-URL Header in MCP Server",
  "details" : "Server-Side Request Forgery via SW-URL Header vulnerability in Apache SkyWalking MCP.\n\nThis issue affects Apache SkyWalking MCP: 0.1.0.\n\nUsers are recommended to upgrade to version 0.2.0, which fixes this issue.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/apache/skywalking-mcp"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.2.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-34476"
  }, {
    "type" : "ADVISORY",
    "url" : "https://github.com/advisories/GHSA-c4hg-6933-x62x"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/apache/skywalking-mcp"
  }, {
    "type" : "WEB",
    "url" : "https://lists.apache.org/thread/v0k1xyzzbtnpyrwxwyn36pbspr8rhjnr"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2026/04/13/4"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-918" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-04-14T23:16:30Z",
    "nvd_published_at" : "2026-04-13T13:16:40Z"
  }
}