CVE-2026-34164

MEDIUM 4.9

Valtimo: Sensitive data exposure through inbox message logging in InboxHandlingService

CVSS Score

4.9

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-532
Vendor	valtimo-platform
Product	valtimo
Published	Apr 16, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Affected Versions

valtimo-platform / valtimo

>= 13.0.0.RELEASE, < 13.22.0.RELEASE

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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