CVE-2026-81091Network attack vectorHinoki check available

Internal service disclosure via caller-supplied proxy target

Published Aug 27, 2026 · Updated Aug 27, 2026

SSRF in the Manufact mcp-use Inspector 2.3.2 and earlier allows remote attackers to read internal-service responses via crafted proxy targets. The mountMcpProxy handler accepts X-Target-URL or __mcp_target and proxies the resolved destination without private-address checks or redirect revalidation. Any network caller that can reach the Inspector proxy can target loopback, link-local, or private services reachable from its host and receive their responses.

CVSS severity8.7
High
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

SSRF in the Manufact mcp-use Inspector 2.3.2 and earlier allows remote attackers to read internal-service responses via crafted proxy targets. The mountMcpProxy handler accepts X-Target-URL or __mcp_target and proxies the resolved destination without private-address checks or redirect revalidation. Any network caller that can reach the Inspector proxy can target loopback, link-local, or private services reachable from its host and receive their responses.

The record

CVE
CVE-2026-81091
Published
Aug 27, 2026
Updated
Aug 27, 2026
Vendor
Manufact
Product
mcp-use
Classifications
CWE-918, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 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 <=2.3.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Manufact · mcp-useversion=0 <=2.3.2

Published CVSS scores

8.7VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
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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