CVE-2026-34476Network attack vector

Authenticated internal-service access via SW-URL override

Published Apr 13, 2026 · Updated Apr 13, 2026

SSRF in Apache SkyWalking MCP 0.1.0 allows remote authenticated users to reach server-accessible services via the SW-URL header. In the affected HTTP transports, a request-level SW-URL override replaces the configured OAP endpoint, directing GraphQL requests to an attacker-selected URL. MCP access is required; exploitation can expose response data or alter state on services reachable from the server.

CVSS severity7.1
High
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in Apache SkyWalking MCP 0.1.0 allows remote authenticated users to reach server-accessible services via the SW-URL header. In the affected HTTP transports, a request-level SW-URL override replaces the configured OAP endpoint, directing GraphQL requests to an attacker-selected URL. MCP access is required; exploitation can expose response data or alter state on services reachable from the server.

The record

CVE
CVE-2026-34476
Published
Apr 13, 2026
Updated
Apr 13, 2026
Vendor
The Apache Software Foundation
Product
Apache SkyWalking MCP
Classifications
CWE-918, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=0.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The Apache Software Foundation · Apache SkyWalking MCPversion=0.1.0

Published CVSS scores

7.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
7.1GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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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