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MEDIUM severity

Valtimo: Sensitive data exposure through inbox message logging in InboxHandlingServiceGHSA-hfrg-mcvw-8mch

MEDIUMFix: valtimo-platform/valtimo#497

GHSA-hfrg-mcvw-8mch is a medium-severity (CVSS 4.9) CWE-532 vulnerability in com.ritense.valtimo:inbox. A fix is available for com.ritense.valtimo:inbox — see the affected versions and patch details below.

Also known asCVE-2026-34164
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Nov 8, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for GHSA-hfrg-mcvw-8mch.

EPSS Exploitation Probability

via FIRST.org ↗
0.4%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs31th percentile — riskier than 31% of all scored CVEsHighest risk
0.00%0.33%0.66%0.99%0.0%0.4%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
☕com.ritense.valtimo:inbox

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

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

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
☕Mavencom.ritense.valtimo:inbox≥ 13.0.0.RELEASE&&< 13.22.0.RELEASE13.22.0.RELEASEcom.ritense.valtimo:inbox:13.22.0.RELEASE

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for com.ritense.valtimo:inbox, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update com.ritense.valtimo:inbox to 13.22.0.RELEASE or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-hfrg-mcvw-8mch is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

### 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` m
O3 Security · Impact-Aware SCA

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Valtimo: Sensitive data exposure through inbox message…