CVE-2026-73844Public exploitNetwork attack vectorHinoki check available

Information disclosure via raw error reflection

Published Aug 14, 2026 · Updated Aug 14, 2026

Information disclosure in onData CKAN MCP Server before 0.4.112 allows remote attackers to read internal data through error responses. src/utils/http.ts embeds the decoded upstream body in a thrown error, while src/worker.ts returns raw Error.message text in JSON-RPC data. Exploitation requires a non-CKAN response, an internal exception, or control of the upstream target; disclosed data can include internal responses, addresses, database errors, and path or stack fragments.

CVSS severity3.7
Low
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Information disclosure in onData CKAN MCP Server before 0.4.112 allows remote attackers to read internal data through error responses. src/utils/http.ts embeds the decoded upstream body in a thrown error, while src/worker.ts returns raw Error.message text in JSON-RPC data. Exploitation requires a non-CKAN response, an internal exception, or control of the upstream target; disclosed data can include internal responses, addresses, database errors, and path or stack fragments.

The record

CVE
CVE-2026-73844
Published
Aug 14, 2026
Updated
Aug 14, 2026
Vendor
onData
Product
CKAN MCP Server
Classifications
CWE-209, CWE-210, T1046
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 14, 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=< 0.4.112

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

onData · CKAN MCP Serverversion=< 0.4.112

Published CVSS scores

3.7GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-209Generation of Error Message Containing Sensitive Information
CWE-210Self-generated Error Message Containing Sensitive Information
T1046Network Service Discovery

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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