CVE-2026-5832Public exploitNetwork attack vector

Unauthenticated internal-service requests via unsanitized tool URLs

Published Apr 9, 2026 · Updated Apr 9, 2026

SSRF in API Lab MCP 0.2.0 through 0.2.1 allows remote attackers to make the server request attacker-selected URLs through HTTP tools. The HTTP interface passes source and url arguments from analyze_api_spec, generate_test_scenarios, and test_http_endpoint directly to fetch or axios without destination validation. Exploitation requires access to invoke a vulnerable MCP tool and server egress to the selected target; reachable internal services can be read or modified according to their exposed APIs.

CVSS severity7.3
High
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in API Lab MCP 0.2.0 through 0.2.1 allows remote attackers to make the server request attacker-selected URLs through HTTP tools. The HTTP interface passes source and url arguments from analyze_api_spec, generate_test_scenarios, and test_http_endpoint directly to fetch or axios without destination validation. Exploitation requires access to invoke a vulnerable MCP tool and server egress to the selected target; reachable internal services can be read or modified according to their exposed APIs.

The record

CVE
CVE-2026-5832
Published
Apr 9, 2026
Updated
Apr 9, 2026
Vendor
atototo
Product
API Lab MCP
Classifications
CWE-918, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 9, 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=0.2.0
  2. Affected versionversion=0.2.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

atototo · API Lab MCPversion=0.2.0; version=0.2.1

Published CVSS scores

7.5VulDBAV:N/AC:L/Au:N/C:P/I:P/A:P
5.5VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
7.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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

Public exploit references

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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