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CVE-2026-34476

25
FAUCET Score

OVERVIEW CVE-2026-34476 is a Server-Side Request Forgery (SSRF) vulnerability in Apache SkyWalking MCP version 0.1.0, exploitable through the SW-URL header. This flaw allows an attacker to manipulate the application into making unintended requests to internal or external systems, potentially exposing sensitive resources. SEVERITY The vulnerability carries a HIGH CVSS score of 7.1, with a network-based attack vector requiring low complexity and low privileges to exploit. The attack does not require user interaction and could result in high confidentiality impact and low integrity impact, though availability remains unaffected. The EPSS score of 0.00079 indicates this is not yet a widespread target in the wild. EXPLOITATION STATUS There is currently no evidence of active exploitation or public exploit code availability. The vulnerability is marked as inactive on threat intelligence lists and does not appear in known exploitation tracking databases. However, users running version 0.1.0 should prioritize upgrading to version 0.2.0 to remediate this risk before potential weaponization.

Impacted Technologies

VendorProductVersion(s)CPE
>= 0.1.0, < 0.2.0CPE matchmatch criteria
cpe:2.3:a:apache:skywalking_mcp:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.1HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
4.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.35%
Probability of exploitation in next 30 days
EPSS Percentile
27.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0035 is in the 15th percentile among its peer group of 17,829 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

gopatch availablevia ghsa
Product: github.com/apache/skywalking-mcpFixed in: 0.2.0
apachevendor investigatingvia vendor_rss
View patch

Vendor Advisories (2)

goGHSA-c4hg-6933-x62xhigh

Apache SkyWalking MCP: Server-Side Request Forgery via SW-URL Header in MCP Server

Apr 13, 2026
apacheapache:www.mail-archive.com/[email protected]/msg10921.html

CVE-2026-34476: Apache SkyWalking MCP: Server-Side Request Forgery via SW-URL Header in MCP Server

Apr 13, 2026

References

openwall.com / lists/oss-security/2026/04/13/4
Mailing List
lists.apache.org / thread/v0k1xyzzbtnpyrwxwyn36pbspr8rhjnr
Vendor Advisory