CVE-2026-34164

Valtimo: Sensitive data exposure through inbox message logging in InboxHandlingService

CVSS 4.9 MEDIUMEPSS 0.4%CWE-532

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 4.9EPSS 0.4%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

16 Apr 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

Valtimo is an open-source business process automation platform. In versions 13.0.0 through 13.21.0, the InboxHandlingService logs the full content of every incoming inbox message at INFO level. Inbox messages can contain highly sensitive information including personal data (PII), citizen identifiers (BSN), and case details. This data is exposed to anyone with access to application logs or any Valtimo user with the admin role through the Admin UI logging module. This issue has been fixed in version 13.22.0. If developers are unable to upgrade immediately, they can restrict access to application logs and adjust the log level for com.ritense.inbox to WARN or higher in their application configuration as a workaround.

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

Affected products

valtimo-platform · valtimo

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References

https://github.com/generiekzaakafhandelcomponent/gzac-issues/issues/653 https://github.com/valtimo-platform/valtimo/commit/f16a1940ba7b34627c0b966f98ca78655ace9335 https://github.com/valtimo-platform/valtimo/pull/497 https://github.com/valtimo-platform/valtimo/releases/tag/13.22.0 https://github.com/valtimo-platform/valtimo/security/advisories/GHSA-hfrg-mcvw-8mch