CVE-2026-73844 ondata CVE debrief

Who should care

Defenders responsible for CKAN MCP Server instances, especially those handling sensitive data or exposed to untrusted sources, should assess exposure and prioritize upgrading to version 0.4.112 or later.

Why it matters

Defenders should care about CVE-2026-73844 because it allows error paths in CKAN MCP Server to reflect sensitive information, potentially exposing internal details and aiding further exploitation. CKAN MCP Server instances handling sensitive data or exposed to untrusted sources should be verified for exposure and upgraded to version 0.4.112 or later. The vulnerability's impact is limited by the lack of information on widespread exploitation or specific affected systems.

• Potential exposure of sensitive information through error messages.
• Possible use of disclosed information for further exploitation.
• Need for verification of CKAN MCP Server instances for exposure.
• Prioritization of upgrades to version 0.4.112 or later.

Technical summary

CKAN MCP Server, a tool for querying CKAN open data portals, is vulnerable to information disclosure. Prior to version 0.4.112, error paths reflect raw upstream response bodies and internal exception messages back to the caller, potentially exposing sensitive information. The vulnerability allows error paths to reflect sensitive information, potentially exposing internal details and aiding further exploitation. This issue was fixed in version 0.4.112. Defenders should prioritize verifying exposure of CKAN MCP Server instances, especially those handling sensitive data or exposed to untrusted sources, and upgrade to version 0.4.112 or later.

Defensive priority

Defenders should prioritize verifying exposure of CKAN MCP Server instances, especially those handling sensitive data or exposed to untrusted sources, and upgrade to version 0.4.112 or later.

Recommended defensive actions

• Verify CKAN MCP Server instances for exposure, especially those handling sensitive data or exposed to untrusted sources.
• Upgrade to CKAN MCP Server version 0.4.112 or later.
• Monitor server logs for potential exploitation attempts.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, its impact, and the fixed version. However, additional information on potential exploitation or affected systems is limited. The source references provide additional context, but no further information on exploitation or affected systems is available. Defenders should verify the exposure of CKAN MCP Server instances, especially those handling sensitive data or exposed to untrusted sources.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.