CVE-2026-19340Public exploitNetwork attack vector

Authenticated internal requests via unvalidated webhook URL

Published Aug 9, 2026 · Updated Aug 9, 2026

Server-side request forgery in anubissbe ProjectHub-MCP 5.0.0 and earlier allows remote authenticated users to reach internal services. The Webhooks API in backend-fix/complete_backend.js stores the caller-controlled url without validation, then passes it to fetch(webhook.url) when the test endpoint runs. Any user able to create and test a webhook can make the server send HTTP POST requests to loopback, private-network, or other arbitrary destinations.

CVSS severity5.3
Medium
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Server-side request forgery in anubissbe ProjectHub-MCP 5.0.0 and earlier allows remote authenticated users to reach internal services. The Webhooks API in backend-fix/complete_backend.js stores the caller-controlled url without validation, then passes it to fetch(webhook.url) when the test endpoint runs. Any user able to create and test a webhook can make the server send HTTP POST requests to loopback, private-network, or other arbitrary destinations.

The record

CVE
CVE-2026-19340
Published
Aug 9, 2026
Updated
Aug 9, 2026
Vendor
anubissbe
Product
ProjectHub-MCP
Classifications
CWE-918, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 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=5.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

anubissbe · ProjectHub-MCPversion=5.0

Published CVSS scores

5.3VulDB CNACVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
6.3VulDB CNACVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
6.5VulDB CNAAV:N/AC:L/Au:S/C:P/I:P/A:P

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.

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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 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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