# CVE-2026-34884: Apache SkyWalking MCP: SSRF via set_skywalking_url Tool and GraphQL Expression Injection in MCP Server

> Attackers can exploit SSRF and GraphQL injection in Apache SkyWalking MCP to access internal resources or execute code.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 18 Aug 2026
- **Updated:** 19 Aug 2026
- **Also known as:** GHSA-fvf9-f2mx-m7qp

## What is CVE-2026-34884?

CVE-2026-34884 is a critical server-side request forgery vulnerability in Apache SkyWalking MCP, published on 18 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

SSRF via set_skywalking_url Tool and GraphQL expression injection 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.

Weakness: CWE-918 (Server-Side Request Forgery)

## Which versions are affected by CVE-2026-34884?

It affects 1 product.


Products: Apache Skywalking Mcp.

## How do I fix CVE-2026-34884?

No fix has been published for CVE-2026-34884 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-34884 being exploited?

There is no known exploitation of CVE-2026-34884 in the wild and no public exploit code.

## Other vulnerabilities in Apache SkyWalking MCP

- [CVE-2026-34476](https://insights.sbomify.com/CVE-2026-34476/): Apache SkyWalking MCP: Server-Side Request Forgery via SW-URL Header in MCP Server (high 7.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-34884 and fix it if it is affected.

What it is: CVE-2026-34884 is a critical server-side request forgery vulnerability in Apache SkyWalking MCP, published on 18 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-34884 in the wild and no public exploit code.

Affected product: Apache SkyWalking MCP. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-34884/ (Markdown: https://insights.sbomify.com/CVE-2026-34884/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-34884
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-34884
- OSV: https://osv.dev/vulnerability/CVE-2026-34884

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-34884/
Summaries are generated and may contain mistakes; the official description above is the record.