CVE-2026-34164: Valtimo Sensitive Data Exposure Through Inbox Vulnerability
MODERATECVE-2026-34164 is a MODERATE (CVSS 4.9) sensitive data exposure through inbox vulnerability (CWE-532: Insertion of Sensitive Information into Log File) affecting Valtimo libraries in the Maven ecosystem. The issue involves sensitive data exposure through inbox message logging in inboxhandlingservice. Remediation is available by upgrading affected packages to version 13.22.0.RELEASE.
CVE-2026-34164 at a Glance
Security Impact
CVSS: 4.9
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N).
How to Fix CVE-2026-34164
To remediate this vulnerability, upgrade all affected Valtimo dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
<dependency>
<groupId>com.ritense.valtimo</groupId>
<artifactId>inbox</artifactId>
<version>13.22.0.RELEASE</version>
</dependency>Run the following command in your project directory to verify that all resolved dependencies use the patched release:
mvn dependency:tree -Dincludes=com.ritense.valtimoHow to Check if You Are Affected
To determine whether your Java application is affected by CVE-2026-34164, inspect your build dependencies using the Maven Dependency Plugin:
mvn dependency:tree -Dincludes=com.ritense.valtimoAnalyze the terminal output to locate any version of Valtimo in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 13.22.0.RELEASE), your application is affected.
Note: The mvn dependency:tree -Dincludes=com.ritense.valtimo command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-532: Insertion of Sensitive Information into Log File, where the product writes sensitive information to a log file. In Valtimo, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2026-34164 Affected Valtimo Versions
1 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
com.ritense.valtimo:inbox
|
Maven |
≥ 13.0.0.RELEASE
< 13.22.0.RELEASE
|
13.22.0.RELEASE
|
References
Frequently Asked Questions
What is CVE-2026-34164?
Which Valtimo versions are affected?
What version fixes CVE-2026-34164?
Is inbox affected?
What is the CVSS score of CVE-2026-34164?
What CWE is associated with CVE-2026-34164?
How can I check Maven dependencies for CVE-2026-34164?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-hfrg-mcvw-8mch",
"modified" : "2026-04-24T20:36:49Z",
"published" : "2026-04-16T20:42:55Z",
"aliases" : [ "CVE-2026-34164" ],
"summary" : "Valtimo: Sensitive data exposure through inbox message logging in InboxHandlingService",
"details" : "### Summary\n\nThe `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.\n\n### Impact\n\nThis data is exposed to:\n- Anyone with access to application logs (stdout/log files)\n- Any Valtimo user with the admin role, through the logging module in the Admin UI\n\n### Affected Code\n\n`com.ritense.inbox.InboxHandlingService#handle` in the `inbox` module.\n\n### Resolution\n\nFixed in [13.22.0](https://github.com/valtimo-platform/valtimo/releases/tag/13.22.0) via commit [`f16a1940ba`](https://github.com/valtimo-platform/valtimo/commit/f16a1940ba7b34627c0b966f98ca78655ace9335) (PR [#497](https://github.com/valtimo-platform/valtimo/pull/497), tracking issue [gzac-issues#653](https://github.com/generiekzaakafhandelcomponent/gzac-issues/issues/653)). The log statement was downgraded from INFO to DEBUG and the message payload was removed from the log output.\n\n### Mitigation\n\nFor versions before 13.22.0, consider:\n- Restricting access to application logs\n- Adjusting the log level for `com.ritense.inbox` to WARN or higher in your application configuration",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Maven",
"name" : "com.ritense.valtimo:inbox"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "13.0.0.RELEASE"
}, {
"fixed" : "13.22.0.RELEASE"
} ]
} ]
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/valtimo-platform/valtimo/security/advisories/GHSA-hfrg-mcvw-8mch"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-34164"
}, {
"type" : "WEB",
"url" : "https://github.com/generiekzaakafhandelcomponent/gzac-issues/issues/653"
}, {
"type" : "WEB",
"url" : "https://github.com/valtimo-platform/valtimo/pull/497"
}, {
"type" : "WEB",
"url" : "https://github.com/valtimo-platform/valtimo/commit/f16a1940ba7b34627c0b966f98ca78655ace9335"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/valtimo-platform/valtimo"
}, {
"type" : "WEB",
"url" : "https://github.com/valtimo-platform/valtimo/releases/tag/13.22.0"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-532" ],
"severity" : "MODERATE",
"github_reviewed" : true,
"github_reviewed_at" : "2026-04-16T20:42:55Z",
"nvd_published_at" : "2026-04-16T22:16:37Z"
}
}