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GHSA-hfrg-mcvw-8mch

MediumCVSS 4.9 / 10
Published Apr 16, 2026·Last modified May 5, 2026
Affected Components(0)

No affected components available

Description

Summary

The InboxHandlingService logs the full content of every incoming inbox message at INFO level (logger.info("Received message: {}", message)). Inbox messages are wrappers around outbox message data, which can contain highly sensitive information such as personal data (PII), citizen identifiers (BSN), and case details.

Impact

This data is exposed to:

  • Anyone with access to application logs (stdout/log files)
  • Any Valtimo user with the admin role, through the logging module in the Admin UI

Affected Code

com.ritense.inbox.InboxHandlingService#handle in the inbox module.

Resolution

Fixed in 13.22.0 via commit f16a1940ba (PR #497, tracking issue gzac-issues#653). The log statement was downgraded from INFO to DEBUG and the message payload was removed from the log output.

Mitigation

For versions before 13.22.0, consider:

  • Restricting access to application logs
  • Adjusting the log level for com.ritense.inbox to WARN or higher in your application configuration
Risk Scores
Base Score
4.9

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker needs high-level or administrative privileges. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a high impact on the confidentiality of the information.

Threat Intelligence
4.5

Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.

EPSS
N/A

Probability that this vulnerability will be exploited in the wild within the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

Related Vulnerabilities
  • CVE-2026-34164
    Alias
  • EUVD-2026-23296
    Alias

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Medium severity
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